GMT (disambiguation)
- GATX
- GMT
- GMT (TV programme)
- GMT Games
- GMT Records
- General Motors GMT platform
- Generic Mapping Tools
- Geometric measure theory
- Giant Magellan Telescope
- Glycine/sarcosine N-methyltransferase
- Goodman–Martinez–Thompson correlation
- Granite Mountain Air Station
- Great Melbourne Telescope
- Greater Manchester Transport
- Green Mountain Transit
- Gregoria Mariska Tunjung
- Grosmont railway station
- Guy McCoy Tormé
- Metal-Textile Union
- Quaternary glaciation