| Cover | Aug. 17, 2023 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Aug. 17, 2023 |
| Entity File Number | 001-41381 |
| Entity Registrant Name | GLOBAL BLOCKCHAIN ACQUISITION CORP. |
| Entity Central Index Key | 0001894951 |
| Entity Tax Identification Number | 87-2045077 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 6555 Sanger Road |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | Orlando |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 32827 |
| City Area Code | 407 |
| Local Phone Number | 720-9250 |
| Written Communications | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
| Common Stock, par value $0.0001 per share | |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | GBBK |
| Security Exchange Name | NASDAQ |
| Redeemable warrants, each warrant exercisable for one share of common stock at an exercise price of $11.50 per whole share | |
| Title of 12(b) Security | Redeemable warrants, each warrant exercisable for one share of common stock at an exercise price of $11.50 per whole share |
| Trading Symbol | GBBKW |
| Security Exchange Name | NASDAQ |
| Rights, each entitling the holder to receive one-tenth of one share of common stock | |
| Title of 12(b) Security | Rights, each entitling the holder to receive one-tenth of one share of common stock |
| Trading Symbol | GBBKR |
| Security Exchange Name | NASDAQ |
