Document and Entity Information - USD ($)	4 Months Ended
	Dec. 31, 2018	Mar. 29, 2019	Jun. 30, 2018
Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	FY
Trading Symbol	GMHIU
Entity Registrant Name	Gores Metropoulos, Inc.
Entity Central Index Key	0001758057
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	No
Entity Current Reporting Status	No
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Shell Company	true
Entity Public Float			$ 0
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		40,000,000
Class F Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		10,000,000