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Inventories, Net (Details) - USD ($) | 12 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Mar. 31, 2023
Inventories, net [Abstract] |  |  |
Impairment for Inventories | $ 211,356 | $ 468,941 | $ 288,604

X
- Definition Amount of Impairment of Inventories. + References No definition available. + Details
Name: | gcl_ImpairmentOfInventories
Namespace Prefix: | gcl_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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