| G | Green |
| G/A | Ground−to−air |
| G/A/G | Ground−to−air and air−to−ground |
| GAMET | Area forecast for low−level flights |
| GAT | General air traffic |
| GCA | Ground controlled approach system or ground controlled approach |
| GEN | General |
| GEO | Geographic or true |
| GER | German language |
| GES | Ground earth station |
| GLD | Glider |
| GLONASS | Global orbiting navigation satellite system ( to be pronounced "GLO−NAS") |
| GMC | Ground movement chart (followed by name/title) |
| GND | Ground |
| GNDCK | Ground check |
| GNSS | Global navigation satellite system |
| GP | Glide path |
| GPS | Global positioning system |
| GR | Hail |
| GRASS | Grass landing area |
| GRVL | Gravel |
| GS | Ground speed |
| GS | Small hail and/or snow pellets |
| GUND | Geoid undulation |
© 2012-21 Kristina Novotna