Additional secured bank loans to be available.

No definition available.

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

- Definition

Available capacity.

+ References

No definition available.

+ Details

Name:	groy_AvailableCapacity
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

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 2025-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2025-en-r&anchor=para_7&doctype=Standard
-URIDate 2025-03-27

+ Details

Name:	ifrs-full_BorrowingsAdjustmentToInterestRateBasis
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_BorrowingsInterestRate
Namespace Prefix:	ifrs-full_
Data Type:	dtr-2022: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
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

+ 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_SecuredOvernightFinancingRatesSofrMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Bank loan (Details Narrative) - USD ($) $ in Thousands	Nov. 25, 2025	Feb. 24, 2025	Mar. 01, 2024
Secured Revolving Credit Facility [Member]
Disclosure of detailed information about borrowings [line items]
Bank loan interest rate margin		1.00%
Secured revolving credit line		$ 30,000
Additional bank loan available		45,000
Available capacity	$ 75,000	$ 75,000
Bank loan maturity date		Mar. 31, 2028	Mar. 31, 2027
Secured Revolving Credit Facility [Member] \| SOFR Rate [Member]
Disclosure of detailed information about borrowings [line items]
Interest rate		3.00%
Amended Secured Revolving Credit Facility [Member]
Disclosure of detailed information about borrowings [line items]
Additional bank loan available	25,000
Available capacity	$ 100,000
Bank loan maturity date	Nov. 19, 2028
Amended Secured Revolving Credit Facility [Member] \| Minimum [Member] \| SOFR Rate [Member]
Disclosure of detailed information about borrowings [line items]
Interest rate	2.50%
Amended Secured Revolving Credit Facility [Member] \| Maximum [Member] \| SOFR Rate [Member]
Disclosure of detailed information about borrowings [line items]
Interest rate	3.50%