CGS (disambiguation)
- BlueCross BlueShield of South Carolina
- Boston University College of General Studies
- C.G.S. colony
- CG (disambiguation)
- CGS
- CGS Aviation
- CUSIP Global Services
- Caistor Grammar School
- California Geological Survey
- Canadian Government Ship
- Canwest Global Communications Corporation
- Caulfield Grammar School
- Center for Genetics and Society
- Central Geological Survey
- Championship Gaming Series
- Chief of the General Staff
- China Geological Survey
- Chittagong Grammar School
- Colyton Grammar School
- Commonwealth Governor's School
- Council of Graduate Schools
- Crescent Girls' School