v3.26.3
Cover Page - shares
 9 Months Ended
Sep. 30, 2026
Nov. 03, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2026  
Document Transition Report false  
Entity File Number 001-42284  
Entity Registrant Name Guardian Pharmacy Services, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 87-3627139  
Entity Address, Address Line One 300 Galleria Parkway SE  
Entity Address, Address Line Two Suite 800  
Entity Address, City or Town Atlanta  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30339  
City Area Code 404  
Local Phone Number 810-0089  
Title of 12(b) Security Class A Common Stock, par value $0.001 per share  
Trading Symbol GRDN  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Entity Central Index Key 0001802255  
Class A common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   63,320,300
Class B common stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   33,619