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  <xs:element id="gtx_SummaryOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" abstract="false" name="SummaryOfSupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gtx_IncreaseDecreaseInAccountsNotesAndOtherReceivables" abstract="false" name="IncreaseDecreaseInAccountsNotesAndOtherReceivables" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_SecuritiesLitigationMember" abstract="true" name="SecuritiesLitigationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_DividendsNotYetDeclaredMember" abstract="true" name="DividendsNotYetDeclaredMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_PercentageOfExcessCashFlowProceedsForYearTwo" abstract="false" name="PercentageOfExcessCashFlowProceedsForYearTwo" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gtx_MandatorilyRedeemablePreferredStockCurrent" abstract="false" name="MandatorilyRedeemablePreferredStockCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_ConsolidatedTotalLeverageRatio" abstract="false" name="ConsolidatedTotalLeverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:decimalItemType"/>
  <xs:element id="gtx_SummaryOfSupplementalBalanceSheetInformationRelatedToOperatingLeasesTableTextBlock" abstract="false" name="SummaryOfSupplementalBalanceSheetInformationRelatedToOperatingLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gtx_ResearchAndDevelopmentOfNewProductCostsMember" abstract="true" name="ResearchAndDevelopmentOfNewProductCostsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_AlternateBaseRateMember" abstract="true" name="AlternateBaseRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_EuroTermLoanFacilityMember" abstract="true" name="EuroTermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_AccruedFreightCostCurrent" abstract="false" name="AccruedFreightCostCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_PSAAndTransactionSecondAmendedPlan2021Member" abstract="true" name="PSAAndTransactionSecondAmendedPlan2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_BankNotesReceivableSoldNotYetCollected" abstract="false" name="BankNotesReceivableSoldNotYetCollected" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_RepaymentsOfDebtorInPossessionFinancingFees" abstract="false" name="RepaymentsOfDebtorInPossessionFinancingFees" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_DebtorReorganizationItemsBidTerminationAndExpenseReimbursement" abstract="false" name="DebtorReorganizationItemsBidTerminationAndExpenseReimbursement" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_RightToOffsetFederalTax" abstract="false" name="RightToOffsetFederalTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_AdvancedDiscountsToCustomersNonCurrent" abstract="false" name="AdvancedDiscountsToCustomersNonCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_ScheduleOfReorganizationItemsTableTextBlock" abstract="false" name="ScheduleOfReorganizationItemsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gtx_ReorganizationItemsPaidNet" abstract="false" name="ReorganizationItemsPaidNet" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_AftermarketMember" abstract="true" name="AftermarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_FactoringAndNotesReceivableTextBlock" abstract="false" name="FactoringAndNotesReceivableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gtx_DebtorReorganizationItemsExpensesRelatedToSeniorNotes" abstract="false" name="DebtorReorganizationItemsExpensesRelatedToSeniorNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_PaymentsForCashOutElection" abstract="false" name="PaymentsForCashOutElection" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_RepaymentsOfLongTermDebtAndAccruedInterest" abstract="false" name="RepaymentsOfLongTermDebtAndAccruedInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_IncrementalCommonSharesAttributableToUnvestedRestrictedStockUnitsAndOtherContingentlyIssuableShares" abstract="false" name="IncrementalCommonSharesAttributableToUnvestedRestrictedStockUnitsAndOtherContingentlyIssuableShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gtx_LitigationPeriodToFileAComplaint" abstract="false" name="LitigationPeriodToFileAComplaint" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gtx_AmortizationOfDeferredIssuanceCosts" abstract="false" name="AmortizationOfDeferredIssuanceCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_StandardProductWarrantyAccrualIncreaseDecreaseForAmountsReclassifiedToLiabilities" abstract="false" name="StandardProductWarrantyAccrualIncreaseDecreaseForAmountsReclassifiedToLiabilities" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_OriginalEquipmentManufacturersMember" abstract="true" name="OriginalEquipmentManufacturersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gtx_StockCashOutElectionDuringPeriodValue" abstract="false" name="StockCashOutElectionDuringPeriodValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_AccruedPostPetitionInterest" abstract="false" name="AccruedPostPetitionInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_DebtorReorganizationItemsEmployeeStockCashOut" abstract="false" name="DebtorReorganizationItemsEmployeeStockCashOut" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gtx_DisclosureOfDetailedInformationAboutTradeReceivablesAndGuaranteedBankNotesTableTextBlock" abstract="false" name="DisclosureOfDetailedInformationAboutTradeReceivablesAndGuaranteedBankNotesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gtx_StockCashOutElectionDuringPeriodShares" abstract="false" name="StockCashOutElectionDuringPeriodShares" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gtx_SupplementalDisclosureOfNonCashAbstract" abstract="true" name="SupplementalDisclosureOfNonCashAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gtx_CreditAgreementMember" abstract="true" name="CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
