GGS
- GG (disambiguation)
- Geelong Grammar School
- Generations and Gender Survey
- Gerald Gentleman Station
- German Geophysical Society
- Germany Guard Service
- Gibson Generating Station
- Girl Geek Scotland
- Girl Guides Singapore
- Global Geo Services
- Global Geospace Science
- Glucosylglycerate synthase
- Gobernador Gregores Airport
- Governor General's Awards
- Gravesend Grammar School
- Grosvenor Grammar School
- Guildford Grammar School
- Guns, Germs, and Steel
- Guru Granth Sahib
- Gyro gunsight
- Ottawa Gee-Gees
- The Great Giana Sisters