GM
- Gm – (s) Gigametre
- GM
- (s) The Gambia (ISO 3166 digram)
- (i) GameMaster (role-playing)
- General Motors
- Genetically Modified
- (s) Germany (FIPS 10-4 country code)
- (i) Guru Meditation (computing)
- GMAC
- (i) General Motors Acceptance Corporation, the original name of the company now known as Ally Financial
- Graduate Management Admission Council
- G-MAC
- (i) Great Midwest Athletic Conference
- GMB
- (s) The Gambia (ISO 3166 trigram)
- (i) General, Municipal, Boilermakers (and Allied Trade Union)
- GmbH – (i) Gesellschaft mit beschränkter Haftung (German, "Company with limited liability")
- GMC
- (i) U.K. General Medical Council
- Gospel Music Channel
- GMD – (s) Gambian dalasi (ISO 4217 currency code)
- GMFSC – (i) Ground Mobile Forces Satellite Communications
- GMI
- (i) Generic Model Interface
- Geometry Model Instance
- GML
- (i) Game Maker Language
- Generalized Markup Language
- Geography Markup Language
- Graph Modelling Language
- Graphical Motion Language
- GUI Markup Language
- GMO – (i) Genetically Modified Organism
- GMPCS – (i) Global Mobile Personal Communications by Satellite
- GMT
- (i) Giant Magellan Telescope
- Greenwich Mean Time
Read more about this topic: List Of Acronyms And Initialisms: G