| Abbreviation | Definition |
|---|---|
| GLC | Government Linked Corporation |
| GLC | Ground Level Concentration |
| GLE | Grade Level Equivalency |
| GLI | General Ledger Interface |
| GLIS | Global Land Information System |
| GLO | GLyOxalase |
| GLO | Goddard Launch Operations |
| GLO | Ground Logistics Operations |
| GLOBE | Global Legislatures Organisation for Balanced Environment |
| GLOBE | Global Learning And Observations To Benefit The Environment |
| GLOBEC | Global Marine Ecosystem Dynamics Program |
| GLOMR | Global Low-Orbiting Message Relay |
| GLOPAC | Gyroscopic LOw-Power Attitude Control |
| GLOSS | Global Sea Level Observing System |
| GLOV | GLobal Observational Vehicle |
| GLOW | Guiding Lives Organically Worldwide |
| GLOW | Ground Lift-Off Weight |
| GLOW | Gross Lift-Off Weight |
| GLOW | Goddard Lidar Observatory For Wind |
| GLOX | GLyolax OXidase |
| GLP | Graduated License Program |
| GLP | Goal Language Processor |
| GLP | Government-Loaned Property |
| GLS | Ground Launch Sequence |
| GLTA | Gonioscopic Laser Trabecular Ablation |
| GLUE | Grade Level Union Executive |
| GLW | Great Lakes Water |
| GLW | General Ledger Warehouse |
| GLWD | Global Lakes and Wetlands Database |
| GLWO | Get-Laid Write-Off |
| GLWQ | Great Lakes Water Quality |
| GLWQ | GrassLand Water Quality |
| GLWQA | Great Lakes Water Quality Agreement |
| GLWQP | Great Lakes Water Quality Program |
| GLY | Water-Glycol Mixture |
| GM | General Manager |
| GM | General Motors |
| GM | Guild Mistress |
| GM | Garbage Mover |
| GM | Games Moderator |
| GM | Grand Matriarch |
| GM | Geometric Mean |
| GM | Gaseous Mixture |
| GM-CSF | Granulocyte Macrophage Colony- Stimulating Factor |
| GMA | The Gold Medal Of Achievement |
| GMAC | General Motors Acceptance Corporation |
| GMAL | General Electric Macro Assembly Language |
| GMB | Grain Marketing Board |
| GMBF | Gastric Mucosa Blood Flow |
| GMC | General Medical Council (UK) |