Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2022	Aug. 05, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2022
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Trading Symbol	GMTX
Entity Registrant Name	Gemini Therapeutics, Inc. /DE
Entity Central Index Key	0001816736
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
Entity Common Stock, Shares Outstanding		43,244,453
Entity File Number	001-39438
Entity Tax Identification Number	85-1612845
Entity Address, Address Line One	297 Boston Post Road #248
Entity Address, City or Town	Wayland
Entity Address, State or Province	MA
Entity Address, Postal Zip Code	01778
City Area Code	617
Local Phone Number	401-4400
Entity Incorporation, State or Country Code	DE
Title of 12(b) Security	Common stock, par value $0.0001 per share
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false