| Gigantotrichoderes cummingi Botero, Le Tirant & Santos-Silva, 2018 |
| Glaucotes Casey, 1913 |
| Glaucotes yuccivorus (Fall, 1907) |
| Gnaphalodes Thomson, 1860 |
| Gnaphalodes trachyderoides Thomson, 1861 |
| Gnomidolon Thomson, 1864 |
| Gnomidolon basicoeruleum Martins, 1962 |
| Gnomidolon sylvarum (Bates, 1892) |
| Gortonia Hovore, 1987 |
| Gortonia sumideroensis Wappes & Santos-Silva, 2020 |
| Graciliini Mulsant, 1839 |
| Grammoptera Audinet-Serville, 1835 |
| Grammoptera militaris (Chevrolat, 1855) |
| Granastyochus Gilmour, 1959 |
| Granastyochus nigropunctatus (Bates, 1881) |
| Graphisurus LeConte, 1852 |
| Graphisurus vexillaris (Bates, 1872) |
| Gymnopsyra Linsley, 1937 |
| Gymnopsyra bupalpa Chemsak, 1991 |
| Hammatoderus Gemminger, 1873 |