Car manufacturer G
| Name | Number of models |
|---|---|
| Gc | 1 |
| Gem | 15 |
| Gemini Lift | 1 |
| General Coach | 18 |
| General Electric | 1 |
| General Motors | 4 |
| General Trailer | 2 |
| Genie | 7 |
| Geo | 6 |
| Georgie Boy | 28 |
| Gillig | 13 |
| Gillig Corp. | 1 |
| Girardin | 9 |
| Gladiator | 1 |
| Glaval | 26 |
| Glendale | 4 |
| Global | 1 |
| Gm | 12 |
| Gmc | 476 |
| Goerlich | 1 |
| Gooseneck | 2 |
| Goshen | 17 |
| Goshen Coach | 7 |
| Gr | 1 |
| Grand Junction | 1 |
| Granville | 1 |
| Great Dane | 21 |
| Grumman | 15 |
| Gulf Stream | 66 |
| Gulf Toyota | 9 |