| Abbreviation | Definition |
|---|---|
| GSR | Grand Sport Racing |
| GSS | Gamaliel Shooting Supply |
| GSSA | Golden State Spirit Association |
| GSSA | Grapevine Southlake Soccer Association |
| GSSA | Grapevine-Southlake Soccer Association |
| GSSA | Greater Sacramento Softball Association |
| GSSA | Greater Sycamore Soccer Association |
| GSSL | Greater Seattle Soccer League |
| GST | Generation Skiboard Team |
| GST | Golfing Skating And Traveling |
| GST | Grand Sport Tourer |
| GST | Grenades, Snarks, & Teleporters |
| GSTD | Grand Stand Thanksgiving Day |
| GSTS | Game Support Ticket System |
| GSV | Greatest Swing Value |
| GSW | Garden State Wrestling |
| GSW | Grappling Studio Wellington |
| GSY | Gym Sports for Youth |
| GT | Game Tank |
| GT | Golf Transporter |