GTM
- Bureau of Global Talent Management
- Factory Five Racing
- GT-MU
- GT.M
- GTM Cars
- Generative topographic map
- Ghana–Togo Mountain languages
- Global Server Load Balancing
- Global Traffic Manager
- Go-to-market strategy
- GoToMeeting
- Golden Triangle Mall
- Google Tag Manager
- Graduate Texts in Mathematics
- Grammar–translation method
- Great Translation Movement
- Greater Manchester
- Greentech Media
- Groovin' the Moo
- Gross Ton Mile
- Guatemala
- Large Millimeter Telescope
- Trailer (vehicle)
- United States Department of State