| Abbreviation | Definition |
|---|---|
| GMP | Global Manpower Professionals |
| GMP | Gresham Motorsports Park |
| GMP | Guilford Medical Partners |
| GMPI | Greater Marlboro Programs Inc |
| GMPI | Greene Metal Products, Inc. |
| GMRI | Gerri Murphy Realty, Inc. |
| GMRI | Government Micro Resources Incorporated |
| GMS | Gemtec Machinery Systems |
| GMSC | Goizueta Marketing Strategy Consultancy |
| GMSS | Global Marketing Support Services |
| GMSS | Gorai Macchimar Sahakari Sanstha, LTD. |
| GMT | Gonzalez Model Talent |
| GMT | Groves Manufacturing & Tooling |
| GMTA | Green Mountain Transit Agency |
| GMTC | Gloria Material Technology Corp |
| GMTI | Gannett Media Technologies International |
| GNAA | Gay Nigger Association of America |
| GNBC | Greater Niagara Ballet Company |
| GNC | General Nutrition Centers |
| GNC | General Nutrition Centre |