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  <xs:element id="gsat_AccruedExpensesAndOtherLiabilitiesDisclosureTextBlockTextBlock" abstract="false" name="AccruedExpensesAndOtherLiabilitiesDisclosureTextBlockTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="gsat_EquipmentSalesReceivableMember" abstract="true" name="EquipmentSalesReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_EffectiveIncomeTaxRateReconciliationWithholdingTaxAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationWithholdingTaxAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_OperatingLossCarryforwardsPercentageExpiring" abstract="false" name="OperatingLossCarryforwardsPercentageExpiring" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_SatelliteProcurementAgreementMember" abstract="true" name="SatelliteProcurementAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_OperatingLeasesAnnualRentEscalationPercentage" abstract="false" name="OperatingLeasesAnnualRentEscalationPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_ProductSPOTMember" abstract="true" name="ProductSPOTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_DebtInstrumentFaceAmountCurrent" abstract="false" name="DebtInstrumentFaceAmountCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_FairValueMeasurementsTable" abstract="true" name="FairValueMeasurementsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gsat_DebtInstrumentInterestRatePayableInKind" abstract="false" name="DebtInstrumentInterestRatePayableInKind" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_SoftwareFacilitiesandEquipmentMember" abstract="true" name="SoftwareFacilitiesandEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ServicesOtherMember" abstract="true" name="ServicesOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_CapitalizedInterestTableTextBlockTableTextBlock" abstract="false" name="CapitalizedInterestTableTextBlockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="gsat_ThermoCapitalPartnersLlcMember" abstract="true" name="ThermoCapitalPartnersLlcMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_NonConvertible13SeniorNotesIssued2023Member" abstract="true" name="NonConvertible13SeniorNotesIssued2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ContractWithCustomerLiabilityFundingAgreementAdditionalConsideration" abstract="false" name="ContractWithCustomerLiabilityFundingAgreementAdditionalConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_VendorFinancingObligationsRollForward" abstract="true" name="VendorFinancingObligationsRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_PartnershipAgreementAdvancementGuarantee" abstract="false" name="PartnershipAgreementAdvancementGuarantee" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ServicesWholesaleCapacityMember" abstract="true" name="ServicesWholesaleCapacityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ServicesDuplexMember" abstract="true" name="ServicesDuplexMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_IntangibleAssetsAndOtherAssetsAccumulatedAmortization" abstract="false" name="IntangibleAssetsAndOtherAssetsAccumulatedAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ProcureGoodsPerformServicesUponPartnerSaleReceivableMember" abstract="true" name="ProcureGoodsPerformServicesUponPartnerSaleReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_LaunchServicesAgreementMember" abstract="true" name="LaunchServicesAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_PerformanceBasedRestrictedStockMember" abstract="true" name="PerformanceBasedRestrictedStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_DebtInstrumentInterestRateAgreedUponPayableInKind" abstract="false" name="DebtInstrumentInterestRateAgreedUponPayableInKind" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_DebtInstrumentCovenantMinimumCashBalance" abstract="false" name="DebtInstrumentCovenantMinimumCashBalance" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ContractWithCustomerLiabilityReimbursementsAndAnticipatedReimbursements" abstract="false" name="ContractWithCustomerLiabilityReimbursementsAndAnticipatedReimbursements" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ServiceSaleReceivableMember" abstract="true" name="ServiceSaleReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_IntangibleAssetsAndOtherAssetsNoncurrent" abstract="false" name="IntangibleAssetsAndOtherAssetsNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_DebtInstrumentIssuancePricePercentageOfPrincipal" abstract="false" name="DebtInstrumentIssuancePricePercentageOfPrincipal" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_VendorFinancingPaymentTerms" abstract="false" name="VendorFinancingPaymentTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_WarrantsUnvestedMember" abstract="true" name="WarrantsUnvestedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_PropertyPlantAndEquipmentAdditionalDisclosuresAxis" abstract="true" name="PropertyPlantAndEquipmentAdditionalDisclosuresAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="gsat_NonConvertible1300PercentSeniorNotesIssued2023Member" abstract="true" name="NonConvertible1300PercentSeniorNotesIssued2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_AssetsAndLiabilitiesLesseeTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLesseeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="gsat_PriorToMarch152025Member" abstract="true" name="PriorToMarch152025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_CashPaidForAbstract" abstract="true" name="CashPaidForAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_EffectiveIncomeTaxRateReconciliationAdjustmentToDeferredTaxAssetsValuationAllowanceAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationAdjustmentToDeferredTaxAssetsValuationAllowanceAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_InterestPayableNoncurrent" abstract="false" name="InterestPayableNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ServicesSPOTMember" abstract="true" name="ServicesSPOTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ProceedsFromPaymentsForEquityPlanTransactions" abstract="false" name="ProceedsFromPaymentsForEquityPlanTransactions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_BusinessCombinationSupportServiceAgreementServicePeriod" abstract="false" name="BusinessCombinationSupportServiceAgreementServicePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_SummaryOfSignificantAccountingPoliciesTable" abstract="true" name="SummaryOfSignificantAccountingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gsat_BusinessCombinationSupportServiceAgreementPrepaidExpense" abstract="false" name="BusinessCombinationSupportServiceAgreementPrepaidExpense" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_DeferredFederalAndStateIncomeTaxExpenseBenefit" abstract="false" name="DeferredFederalAndStateIncomeTaxExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ContractWithCustomerReceivableBillingPeriod" abstract="false" name="ContractWithCustomerReceivableBillingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent" abstract="false" name="ContractWithCustomerLiabilityAccruedLiabilitiesAndCustomerDepositsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_EquityIssuedInBusinessCombinationMeasurementInput" abstract="false" name="EquityIssuedInBusinessCombinationMeasurementInput" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="gsat_A2019FacilityAgreementMember" abstract="true" name="A2019FacilityAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_EquityMethodInvestmentTransactionThresholdForApprovalRequirement" abstract="false" name="EquityMethodInvestmentTransactionThresholdForApprovalRequirement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_A2021FundingAgreementMember" abstract="true" name="A2021FundingAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_RegulatoryAuthorizationsMember" abstract="true" name="RegulatoryAuthorizationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_VendorFinancingMember" abstract="true" name="VendorFinancingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_CapitalizedInterestExpensedDuringPeriod" abstract="false" name="CapitalizedInterestExpensedDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_NoncashConsiderationWholesaleContract" abstract="false" name="NoncashConsiderationWholesaleContract" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_AccountsReceivableReclassificationToCurrent" abstract="false" name="AccountsReceivableReclassificationToCurrent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_A2023FundingAgreementMember" abstract="true" name="A2023FundingAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_VendorFinancingPaymentPeriodWithinDueDate" abstract="false" name="VendorFinancingPaymentPeriodWithinDueDate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_WarrantsIssued" abstract="false" name="WarrantsIssued" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_Convertible800SeniorNotesIssued2013Member" abstract="true" name="Convertible800SeniorNotesIssued2013Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_FairValueMeasurementsLineItems" abstract="true" name="FairValueMeasurementsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_SummaryOfSignificantAccountingPoliciesLineItems" abstract="true" name="SummaryOfSignificantAccountingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesChangeInDeferredRateAmount" abstract="false" name="EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxesChangeInDeferredRateAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ProceedsFromDebtPremiumRefund" abstract="false" name="ProceedsFromDebtPremiumRefund" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_SpaceComponentMember" abstract="true" name="SpaceComponentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_CapitalizedCostsToFulfillAContractAmortization" abstract="false" name="CapitalizedCostsToFulfillAContractAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_RepaymentOfVendorFinancing" abstract="false" name="RepaymentOfVendorFinancing" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_PartnershipAgreementProceeds" abstract="false" name="PartnershipAgreementProceeds" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_SatellitesMember" abstract="true" name="SatellitesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ScheduleOfDepreciationExpenseTableTextBlockTableTextBlock" abstract="false" name="ScheduleOfDepreciationExpenseTableTextBlockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="gsat_A2009FacilityAgreementMember" abstract="true" name="A2009FacilityAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_GrossInterestCostsCapitalized" abstract="false" name="GrossInterestCostsCapitalized" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ReCharacterizationOfFundingAgreementToDebt" abstract="false" name="ReCharacterizationOfFundingAgreementToDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_AdjustmentsToAdditionalPaidInCapitalExtinguishmentOfDebt" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalExtinguishmentOfDebt" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_A2023FundingAgreementThermoGuaranteeMember" abstract="true" name="A2023FundingAgreementThermoGuaranteeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_AccruedCompensationAndBenefitsExcludingTaxesCurrent" abstract="false" name="AccruedCompensationAndBenefitsExcludingTaxesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_PropertyPlantAndEquipmentAdditionalDisclosuresDomain" abstract="true" name="PropertyPlantAndEquipmentAdditionalDisclosuresDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_DebtInstrumentPercentageFundedByPartner" abstract="false" name="DebtInstrumentPercentageFundedByPartner" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gsat_PartnershipAgreementOwnershipThresholdPeriod" abstract="false" name="PartnershipAgreementOwnershipThresholdPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_DebtDiscountPremiumUnamortizedDiscountEmbeddedDerivative" abstract="false" name="DebtDiscountPremiumUnamortizedDiscountEmbeddedDerivative" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ServicesSubscriberDrivenMember" abstract="true" name="ServicesSubscriberDrivenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_PartnershipAgreementMinimumOwnershipThresholdPercentage" abstract="false" name="PartnershipAgreementMinimumOwnershipThresholdPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gsat_PrepaidSatelliteConstructionCostsAndRelatedCustomerReceivables" abstract="false" name="PrepaidSatelliteConstructionCostsAndRelatedCustomerReceivables" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_BusinessAcquisitionEquityInterestIssuedOrIssuableThresholdTradingDays" abstract="false" name="BusinessAcquisitionEquityInterestIssuedOrIssuableThresholdTradingDays" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gsat_AccruedSatelliteConstructionCostsCurrent" abstract="false" name="AccruedSatelliteConstructionCostsCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_EquityMethodInvestmentThresholdRequiringAStrategicReviewCommitteeOwnershipPercentage" abstract="false" name="EquityMethodInvestmentThresholdRequiringAStrategicReviewCommitteeOwnershipPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gsat_PartnershipAgreementAdvancementGuaranteeStockIssuanceTradingDayThreshold" abstract="false" name="PartnershipAgreementAdvancementGuaranteeStockIssuanceTradingDayThreshold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gsat_Phase1ServiceFeeServiceRelatedOperatingExpensesAndCapitalExpendituresMember" abstract="true" name="Phase1ServiceFeeServiceRelatedOperatingExpensesAndCapitalExpendituresMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_PrepaidInventoryCurrent" abstract="false" name="PrepaidInventoryCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_GroundComponentMember" abstract="true" name="GroundComponentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsStockMarketPrice" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsStockMarketPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="gsat_OperatingLeaseCostAbstract" abstract="true" name="OperatingLeaseCostAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_AssetImpairmentChargesAndInventoryWriteDown" abstract="false" name="AssetImpairmentChargesAndInventoryWriteDown" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_PriorTo2025Member" abstract="true" name="PriorTo2025Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_AllowanceForDoubtfulAccountsReceivableProvisionNetOfRecoveries" abstract="false" name="AllowanceForDoubtfulAccountsReceivableProvisionNetOfRecoveries" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_VendorFinancingPercentOfContractPriceDeferred" abstract="false" name="VendorFinancingPercentOfContractPriceDeferred" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gsat_DebtInstrumentMaximumPrepaymentReceivable" abstract="false" name="DebtInstrumentMaximumPrepaymentReceivable" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_NoncashSSAExpenseNet" abstract="false" name="NoncashSSAExpenseNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_IncomeTaxDisclosureLineItems" abstract="true" name="IncomeTaxDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_DuplexFinishedGoodsChipsAndComponentPartsMember" abstract="true" name="DuplexFinishedGoodsChipsAndComponentPartsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_PartnershipAgreementPrincipalPayment" abstract="false" name="PartnershipAgreementPrincipalPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_LongTermDebtPrincipalAmountAbstract" abstract="true" name="LongTermDebtPrincipalAmountAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_DebtInstrumentInterestRatePayableInCash" abstract="false" name="DebtInstrumentInterestRatePayableInCash" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_DebtInstrumentUnamortizedDiscountThermoGuarantee" abstract="false" name="DebtInstrumentUnamortizedDiscountThermoGuarantee" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_LongTermDebtCarryingValueAbstract" abstract="true" name="LongTermDebtCarryingValueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gsat_FiniteLivedIntangibleAssetsExcludingAssetsInProgress" abstract="false" name="FiniteLivedIntangibleAssetsExcludingAssetsInProgress" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_StockIssuedDuringPeriodSharesWarrantsExercised" abstract="false" name="StockIssuedDuringPeriodSharesWarrantsExercised" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gsat_GlobalStarSystemMember" abstract="true" name="GlobalStarSystemMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_IncomeTaxDisclosureTable" abstract="true" name="IncomeTaxDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gsat_AdjustmentsToAdditionalPaidInCapitalFairValueOfGuaranteeAssociatedWithFundingAgreement" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalFairValueOfGuaranteeAssociatedWithFundingAgreement" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ScheduleOfAmortizationExpensesTableTextBlock" abstract="false" name="ScheduleOfAmortizationExpensesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="gsat_GainLossOnIssuanceOfWarrants" abstract="false" name="GainLossOnIssuanceOfWarrants" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_WholesaleCapacityCustomerMember" abstract="true" name="WholesaleCapacityCustomerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_AccruedConstructionCostsMember" abstract="true" name="AccruedConstructionCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_CommonStockRestrictedMember" abstract="true" name="CommonStockRestrictedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_StandardProductWarrantyPeriod" abstract="false" name="StandardProductWarrantyPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gsat_XCOMLabsIncMember" abstract="true" name="XCOMLabsIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_WarrantsAndRightsOutstandingAmortizationOfFairValueAdjustment" abstract="false" name="WarrantsAndRightsOutstandingAmortizationOfFairValueAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_PurchaseObligationCapitalExpenditureReimbursementPercent" abstract="false" name="PurchaseObligationCapitalExpenditureReimbursementPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gsat_NonCashInterestExpenseCashFlow" abstract="false" name="NonCashInterestExpenseCashFlow" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_CommonStockWarrantVestingUponAdvancesAchievementMember" abstract="true" name="CommonStockWarrantVestingUponAdvancesAchievementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gsat_ProductCommercialLoTMember" abstract="true" name="ProductCommercialLoTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_OperatingLeaseInterestExpense" abstract="false" name="OperatingLeaseInterestExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ForgivenessOfPrincipalAndInterestOfPPPLoan" abstract="false" name="ForgivenessOfPrincipalAndInterestOfPPPLoan" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_StockIssuedDuringPeriodValueWarrantsExercised" abstract="false" name="StockIssuedDuringPeriodValueWarrantsExercised" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_ContractWithCustomerLiabilityAdvancePaymentCurrent" abstract="false" name="ContractWithCustomerLiabilityAdvancePaymentCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gsat_CommercialLoTMember" abstract="true" name="CommercialLoTMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gsat_DebtRedemptionPeriodAxis" abstract="true" name="DebtRedemptionPeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
</xs:schema>
