| Abbreviation | Definition |
|---|---|
| GB | Gravity Bong |
| GBA | Game Boy Advanced |
| GBC | Gift Box Capsules |
| GBG | Grille Between Glass |
| GBR | Gas Burner Racks |
| GBS | Great British String |
| GC | Gift Certificate |
| GC | Glass Case |
| GC | Glass Container |
| GC | Grandfather Clock |
| GCC | General Consumer Commodity |
| GCC | Gifts Creations Catalog |
| GCCC | Genuine Counterfeit Cuban Cigar |
| GCCD | Generation Capacity Charge Discount rate |
| GCCP | Galvanized Cage Cup, Pint-sized |
| GCCQ | Galvanized Cage Cup, Quart sized |
| GCCV | Gun Caddy Closet Vault gun safe |
| GCL | Geosynthetic Clay Liner |
| GCM | Ground Continuity Monitoring (electrical connector) |
| GCN | Game Cube Nintendo |