Cover Page - shares	9 Months Ended
	Sep. 30, 2023	Nov. 10, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
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		8,659,978
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
Title of 12(b) Security	Common Stock, par value $0.0001 per share
Trading Symbol	GIA
Security Exchange Name	NASDAQ
Document Quarterly Report	true