| Abbreviation | Definition |
|---|---|
| GMH | General Mechanical Heap |
| GMHO | Giggled My Head Off |
| GMKF | God Made Kangaroos Fart |
| GML | Great Made Language |
| GMO | Get Monsanto Out |
| GMO | Girl Make Out |
| GMP | Give Me Paper |
| GMS | Gully Man Screaming |
| GMSC | Give Me Some Cheese |
| GMT | Ghana Maybe Time |
| GMT | Greek Maybe Time |
| GMYM | Give Me Your Money |
| GNC | Gargoyles News Central |
| GNC | Ginnys Naturally Cosmic |
| GNC | Ginny's Naturally Cosmic |
| GNC | Great Notions Condensed |
| GNH | Gross National Happiness |
| GNO | Girl's Night Out |
| GNP | Garbage, Noise, and Pollution |
| GNP | Going Nowhere Prettyfast |