GM
- G (disambiguation)
- G minor
- GM (magazine)
- GM chassis
- GM1
- Gamemaster
- Geiger–Müller tube
- General MIDI
- General Mills
- General Motors
- General manager
- Genetic modification
- Genital mutilation
- George Medal
- Germany
- Gigametre
- Gm (digraph)
- Google Maps
- Gram
- Grandmaster (chess)
- Grandmaster (disambiguation)
- Grandmaster (martial arts)
- Gunner's mate
- M (disambiguation)
- MG (disambiguation)
- Maria Goeppert Mayer
- Metacentric height
- Motors Liquidation Company
- RGM-79 GM
- Standard gravitational parameter
- The Gambia
- Transconductance
- Unified Soil Classification System