| Garmannia rubra Rosén, 1911 |
| Garmannia spongicola Radcliffe, 1917 |
| Gerhardinus Meek & Hildebrand, 1928 |
| Gerhardinus nudus Meek & Hildebrand, 1928 |
| Ginsburgellus Böhlke & Robins, 1968 |
| Ginsburgellus novemlineatus (Fowler, 1950) |
| Gobiidae Cuvier, 1816 |
| Gobiinae Cuvier, 1816 |
| Gobiosoma Girard, 1858 |
| Gobiosoma bosc (Lacépède, 1800) |
| Gobiosoma brocki Ginsburg, 1938 |
| Gobiosoma chiquita (Jenkins & Evermann, 1889) |
| Gobiosoma crescentalis Gilbert, 1892 |
| Gobiosoma digueti Pellegrin, 1901 |
| Gobiosoma dilepis (Robins & Böhlke, 1964) |
| Gobiosoma etheostoma (Jordan & Starks, 1895) |
| Gobiosoma genie Böhlke & Robins, 1968 |
| Gobiosoma grosvenori (Robins, 1964) |
| Gobiosoma hemigymnum (Eigenmann & Eigenmann, 1888) |
| Gobiosoma histrio Jordan, 1884 |