Additional draw down.

No definition available.

Name:	groy_AdditionalDrawDown
Namespace Prefix:	groy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Additional secured bank loans to be available.

+ References

No definition available.

+ Details

Name:	groy_AdditionalSecuredBankLoansToBeAvailable
Namespace Prefix:	groy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Borrowings maturity date.

+ References

No definition available.

+ Details

Name:	groy_BorrowingsMaturityDate
Namespace Prefix:	groy_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Standby fee on undrawn portion of bank loan.

+ References

No definition available.

+ Details

Name:	groy_StandbyFeeOnUndrawnPortionOfBankLoan
Namespace Prefix:	groy_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of loans received from banks that have been secured by collateral. [Refer: Loans received]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2023-03-23

+ Details

Name:	ifrs-full_SecuredBankLoansReceived
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	ifrs-full_BorrowingsByNameAxis=groy_SecuredRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=groy_BaseRatesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=groy_SecuredOvernightFinancingRateSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=groy_AmendedFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BorrowingsByNameAxis=groy_AdditionalDrawdownMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_BusinessCombinationsAxis=groy_CozaminMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Bank loan (Details Narrative) - USD ($) $ in Thousands				12 Months Ended
Bank loan (Details Narrative) - USD ($) $ in Thousands	Feb. 17, 2023	Sep. 14, 2022	Jan. 24, 2022	Dec. 31, 2023	Aug. 30, 2023	Feb. 10, 2023
Disclosure of detailed information about borrowings [line items]
Additional Draw Down				$ 10,287
Secured Revolving Credit Facility [Member]
Disclosure of detailed information about borrowings [line items]
Bank loan availed			$ 10,000
Additional bank loan available			$ 15,000
Standby fee on undrawn portion of bank loan			0.90%
Bank loan maturity date		Mar. 31, 2025	Mar. 31, 2023
Secured Revolving Credit Facility [Member] \| Base Rate [Member]
Disclosure of detailed information about borrowings [line items]
Bank loan interest rate margin			3.00%
Secured Revolving Credit Facility [Member] \| SOFR Rate [Member]
Disclosure of detailed information about borrowings [line items]
Bank loan interest rate margin			4.00%
Amended Facility
Disclosure of detailed information about borrowings [line items]
Bank loan availed					$ 25,000	$ 20,000
Additional bank loan available					10,000	$ 15,000
Additional Draw Down	$ 10,287
Additional Drawdown \| Cozamin [member]
Disclosure of detailed information about borrowings [line items]
Additional bank loan available					$ 7,500