GMS
- GM (disambiguation)
- GMS (music group)
- GMS (software)
- GMS Motorcycles
- GMS Racing
- GMS syndrome
- GameMaker Studio
- Gates Millennium Scholars Program
- General medical services
- Geographic Messaging Service
- Geostationary Meteorological Satellite
- Glen Mills Schools
- Global MapleStory
- Globalization management system
- Glycerol monostearate
- Good Morning Scotland
- Google Mobile Services
- Governor Morehead School
- Great Marlow School
- Greater Mekong Subregion
- Greenbriar Middle School
- Grocott's methenamine silver stain
- Gross Merchandise Sales
- Noel Grisham Middle School