| Abbreviation | Definition |
|---|---|
| GBL | Gangwayed Bogie Luggage |
| GBL | Government Bill of Lading |
| GBR | Ground Based Radar |
| GCAS | Ground Collision Avoidance System |
| GCAT | Gainesville Citizens for Active Transportation |
| GCE | Ground Control Equipment |
| GCI | Grade Crossing Inventory |
| GCIS | Grade Crossing Inventory System |
| GCK | Gearbox Connection Kit |
| GCLR | Gold Coast Light Rail |
| GCRA | Greene County Regional Airport |
| GCRAA | Greene County Regional Airport Authority |
| GCRTA | Greater Cleveland Regional Transportation Authority |
| GCV | Ground Combat Vehicle |
| GCW | Gross Combination Weight |
| GCWR | Gross Combination Weight Rating |
| GCWR | Gross Combined Weight Rating |
| GD | Gradient Descent |
| GDI | Gasoline Direct Injection |
| GDL | Garage Door Lube |