Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2024	Aug. 13, 2024
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2024
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q2
Document Quarterly Report	true
Document Transition Report	false
Entity Registrant Name	GENERATION ASIA I ACQUISITION LIMITED
Entity Central Index Key	0001852061
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Interactive Data Current	Yes
Securities Act File Number	001-41239
Entity Tax Identification Number	98-1588665
Entity Address, Address Line One	Boundary Hall
Entity Address, Address Line Two	Cricket Square
Entity Address, City or Town	Grand Cayman
Entity Address, Country	KY
Entity Address, Postal Zip Code	KY1-1102
City Area Code	345
Local Phone Number	814-5580
Entity Incorporation, State or Country Code	E9
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	GAQ
Security Exchange Name	NASDAQ
Class A Ordinary Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		4,794,855
Class B Ordinary Shares
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		3,045,000