| Abbreviation | Definition |
|---|---|
| GCOS | Global Conference on Open Source |
| GCR | General Conference Resolution |
| GCSP | Grand Canyon Star Party |
| GCWM | General Conference on Weights and Measures |
| GCYP | Global Conference of Young Parliamentarians |
| GDC | Game Developer Conference |
| GDCE | Game Developers Conference Europe |
| GDFC | Gulf Diabetic Foot Conference |
| GDW | Game Designers Workshop |
| GEAS | Gartner Enterprise Architecture Summit |
| GEBC | Greater Eastern Basketball Conference |
| GEC | Gaseous Electronics Conference |
| GECC | Georgia Emergency Communications Conference |
| GELE | Global Engagement and Leadership Experience |
| GES | Global Education Summit |
| GES | Global Engagement Summit |
| GES | Global Entrepreneurship Summit |
| GFC | Global Fleet Conference |
| GFES | Global Forum on Energy Security |
| GFSC | Global Food Safety Conference |