GMT
GMT stands for:
- Greenwich Mean Time
- Générale de Mécanique et de Thermique , a former French automobile manufacturer
- Metal-Textile-Food Union, part of the Austrian Federation of Trade Unions
- Giant Magellan Telescope , an astronomical telescope
- Generic Mapping Tools , an open source software for creating maps
- Glass fiber mat thermoplastic , semi-finished product made from glass fiber, which is used in industry due to its lightweight construction
- Society for Maritime Technology
- Basics of measurement technology , a subject
- Design and media technology , profile subject at the technical high school
- GMT Communications Partners III LLP, London-based investment firm
- GMT Games , a game maker
- GMT Gummi-Metall-Technik , a manufacturer of vibration dampers from Bühl (Baden)
- G: MT - Greenwich Mean Time, a British film directed by Taylor Hackford
- VEB Gießerei und Maschinenbau Torgelow , a former GDR company, today the Torgelow iron foundry
- Geometric mean titer, geometric mean of all measured antibody concentrations (titer), see titer (medicine)