| Abbreviation | Definition |
|---|---|
| GASC | Great American Song Contest |
| GAT | Global Awards Token |
| GBE | Certified Green Building Engineer |
| GBE | Knight Grand Cross of the British Empire |
| GBEA | Great British Entrepreneur Awards |
| GBPA | Great British Pub Awards |
| GC | George Cross |
| GCB | Knight Grand Cross |
| GCBA | Georgia Children's Book Awards |
| GCCY | Grand Cross Order of the Crown of Yugoslavia |
| GCIH | Gra-Cruz Infante Dom Henrique |
| GCMG | Knight Grand Cross or Dame Grand Cross |
| GCON | Grand Commander of the Order of the Niger |
| GCSI | Knight Grand Commander of the Star of India |
| GDA | Golden Doodle Award |
| GDCA | Game Developers Choice Awards |
| GESA | Global Edtech Startups Awards |
| GGAA | Green Gown Awards Australasia |
| GGGGG | Great Garrulous Garbage Gutting Guillotine |
| GGGGGG | G-6 Great Garrulous Garbage Gutting Guillotine |