| Abbreviation | Definition |
|---|---|
| GRAB | Gaming Review Advisory Board |
| GRACE | Great Runner And Creative Exceller |
| GRASP | Genetic Racing Ability Stud Performance |
| GRBL | Greater Rockford Baseball League |
| GRD | Guard |
| GREAT | Gratitude, Responsibility, Enthusiasm, Attitude, and Teamwork |
| GRFC | Glasgow Rangers Fan Club |
| GRG | Go Rangers Go |
| GRITS | Gals Racing In The South |
| GRITS | Golfing Region In Texas Southern |
| GRITS | Greater Raleigh Intrepid Tandem Society |
| GRM | Grapevine Racing Motors |
| GRR | Grizzly River Run |
| GRRA | Goldwing Road Riders Association |
| GRT | Gumbo Racing Team |
| GRY | Gray |
| GS | Game Shares |
| GS | Game Sounds |
| GS | Game Spot |
| GS | Games Started |