Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2022	May 13, 2022
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q1
Entity Registrant Name	GigCapital5, Inc.
Entity Central Index Key	0001844505
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		29,545,000
Entity Shell Company	true
Entity File Number	001-40839
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-1728920
Entity Address, Address Line One	1731 Embarcadero Rd
Entity Address, Address Line Two	Suite 200
Entity Address, City or Town	Palo Alto
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94303
City Area Code	650
Local Phone Number	276-7040
Document Transition Report	false
Document Quarterly Report	true
Units
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one share of common stock, $0.0001 par value, and one redeemable warrant
Trading Symbol	GIA.U
Security Exchange Name	NYSE
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	GIA
Security Exchange Name	NYSE
Warrants
Document Information [Line Items]
Title of 12(b) Security	Redeemable warrants, each full warrant exercisable for one share of common stock at an exercise price of $11.50 per share
Trading Symbol	GIA.WS
Security Exchange Name	NYSE