| Abbreviation | Definition |
|---|---|
| GIMC | Garden Island Motorcycle Club |
| GISC | Golden Isles Sailing Club |
| GISC | Grand Island Soccer Club |
| GIVC | Guildford International Volleyball Club |
| GJMC | Gypsy Joker Motorcycle Club |
| GKC | Gibraltar Kennel Club |
| GKC | Golden Knights Club |
| GLAC | Great Lakes Athletic Club |
| GLAC | Greater Latrobe Aqua Club |
| GLCC | Great Lakes Cruising Club |
| GLGC | Great Lakes Gliding Club |
| GLID | Gay Lesbian Independent Democrats |
| GLITS | Greater Lafayette Information Technology Society |
| GLMC | Glacial Lakes Motorcycle Club |
| GLOC | Greater Lincoln Obedience Club |
| GLSBC | Great Lakes Steel Boat Club (Ecorse, MI) |
| GLTC | Galway Lawn Tennis Club |
| GLWC | Great Lakes Whippet Club |
| GLWC | Great Lakes Wrestling Club |
| GLYC | George Lakes Yacht Club |