| Abbreviation | Definition |
|---|---|
| GPGC | Great Plains Growers Conference |
| GPMM | Green Power Marketing Meeting |
| GPTC | Great Plains Theatre Conference |
| GPTW | Great Place To Work |
| GRAC | Great Rivers Athletic Conference |
| GRC | Gordon Research Conference |
| GRC | Gordon Research Conferences |
| GRC | Gordon Resource Conference |
| GRFC | Global Rail Freight Conference |
| GRHF | Global Reproductive Health Forum |
| GRLC | Global Restaurant Leadership Conference |
| GRLC | Great Rivers Lacrosse Conference |
| GRPC | Gun Rights Policy Conference |
| GRSC | Global Refugee Simulation Conference |
| GSAC | Garden State Athletic Conference |
| GSAC | Golden State Athletic Conference |
| GSAC | Great South Athletic Conference |
| GSC | Gulf South Conference |
| GSCC | Gardner Steel Conference Center |
| GSCC | Graduate Student Combinatorics Conference |