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Commitments and Contingencies (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Dec. 18, 2024 | Mar. 31, 2025
Commitments and Contingencies [Abstract] |  |
Recoupable sales guarantee payable | $ 5,000,000 |
Non recoupable sales guarantee payable | $ 5,000,000 |
Sales guarantee commitment |  | $ 3,000,000

X
- Definition Non recoupable sales guarantee payable. + References No definition available. + Details
Name: | gcl_NonRecoupableSalesGuaranteePayable
Namespace Prefix: | gcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Recoupable sales guarantee payable. + References No definition available. + Details
Name: | gcl_RecoupableSalesGuaranteePayable
Namespace Prefix: | gcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Sales guarantee commitment. + References No definition available. + Details
Name: | gcl_SalesGuaranteeCommitment
Namespace Prefix: | gcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration