English abbreviations from gmsep to gnc
- GMSEP (Georgia Media Specialist Evaluation Program)
- GMSFP (George Mason Society Freedom Project)
- GMSN (Gunners Mate Seaman)
- GMSS (Global Mobile Satellite Services)
- GMT (Greenwich Mean Time)
- GMTA (General Motors Technical Academy)
- GMTI (Ground Moving Target Indicator)
- GMTK (General Mechanics Tool Kit)
- GMU (Greenville Downtown Airport)
- GMV (Monument Valley Airport (FAA: UT25))
- GMW (General Magnet Wire)
- GMZ (La Gomera Airport)
- gn (Guaraní language (ISO 639-1 code))
- GNA (Ghana National Archives)
- Gnalis (Generalis ("General"))
- GNAS (Grand National Archery Society)
- GNAT (Ghana National Association of Teachers)
- GNB (Guinea-Bissau (ISO 3166 trigram))
- GNC ("G&C Records" NetLabel)