Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Apr. 26, 2024	Jun. 30, 2023
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Document Transition Report	false
Document Financial Statement Error Correction [Flag]	false
Entity Interactive Data Current	Yes
ICFR Auditor Attestation Flag	false
Amendment Flag	false
Document Period End Date	Dec. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Documents Incorporated by Reference [Text Block]	None
Entity Information [Line Items]
Entity Registrant Name	GLOBAL BLOCKCHAIN ACQUISITION CORP.
Entity Central Index Key	0001894951
Entity File Number	001-41381
Entity Tax Identification Number	86-2045077
Entity Incorporation, State or Country Code	DE
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	true
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Public Float			$ 10.44
Entity Contact Personnel [Line Items]
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
Entity Phone Fax Numbers [Line Items]
City Area Code	(407)
Local Phone Number	720-9250
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		7,191,880
Common Stock, par value $.0001 per share
Entity Listings [Line Items]
Title of 12(b) Security	Common Stock, par value $.0001 per share
Trading Symbol	GBBK
Security Exchange Name	NASDAQ
Rights, each right convertible into one-tenth of one share of common stock
Entity Listings [Line Items]
Title of 12(b) Security	Rights, each right convertible into one-tenth of one share of common stock
Trading Symbol	GBBKR
Security Exchange Name	NASDAQ
Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per whole share
Entity Listings [Line Items]
Title of 12(b) Security	Warrants, each whole 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