| Gansia flavata Ashe & Lingafelter, 1996 |
| Gansia fortemaculata Ashe & Lingafelter, 1996 |
| Gasola Reitter, 1882 |
| Gastrisus Sharp, 1876 |
| Gastrisus newtonorum Navarrete-Heredia & Márquez, 1998 |
| Gastrolobium Casey, 1905 |
| Gastrolobium arizonense Horn, 1885 |
| Gastrolobium arizonense var. peninsulare Casey, 1905 |
| Geomitopsis Scheerpeltz, 1931 |
| Geomitopsis (Pseudogeomitopsis) Orousset, 1985 |
| Glenus Kraatz, 1857 |
| Glenus extimus Sharp, 1887 |
| Glenus flohri Sharp, 1884 |
| Glenus setosus Sharp, 1887 |
| Globa Raffray, 1887 |
| Globa vulnerata (Sharp, 1887) |
| Glyptoma Erichson, 1839 |
| Glyptoma brevicristatus Horn, 1871 |
| Glyptoma costale Erichson, 1840 |
| Glyptoma ruficolle Fauvel, 1864 |