GBM
- Fermi Gamma-ray Space Telescope
- GBM (League of Legends player)
- Game Boy Micro
- Game Boy line
- Garbaharey Airport
- Garhwali language
- Gateway belief model
- Generic Buffer Management
- Geoffrey Bwalya Mwamba
- Geometric Brownian motion
- Glomerular basement membrane
- Gradient boosting
- Grand Bauhinia Medal
- Grand Besançon Métropole
- Greater Britain Movement
- Green Belt Movement