| Galveston Pirate SC | National Premier Soccer League | — | 2010 | — |
| Georgia FC | — | Atlanta | — | Atlanta Silverbacks Park |
| Georgia Generals | — | Atlanta | 1982 | — |
| Georgia Revolution | National Premier Soccer League | McDonough | 2010 | Henry County High School |
| Gigantes de Carolina FC | Puerto Rico Soccer League | Carolina | 2008 | Roberto Clemente Stadium |
| Gold Star FC Detroit | National Independent Soccer Association | — | 2022 | — |
| Golden Gate Gales | — | Oakland | 1980 | — |
| Gotham FC | National Women's Soccer League | Whippany | 2006 | Sports Illustrated Stadium |
| GPS Portland Phoenix | USL League Two | Portland | 2009 | Memorial Stadium |
| Grand Rapids Alliance | National Premier Soccer League | — | 2002 | — |
| Greater Lowell United FC | — | — | 2013 | Cawley Memorial Stadium |
| Greek-American A.C. | San Francisco Soccer Football League | San Francisco | 1949 | Boxer Stadium |
| Greenville Lions | USL League Two | — | 2001 | Sirrine Stadium |
| Greenville Triumph SC | USL League One | Greenville | March 13, 2018 | — |
| Gremio Lusitano | — | — | 1922 | Lusitano Stadium |
| Guam Shipyard | Guam Men's Soccer League | Tamuning | 1997 | Guam National Football Stadium |
| Guayama FC | Puerto Rico Soccer League | — | 1949 | — |
| Guaynabo Fluminense FC | Puerto Rico Soccer League | Guaynabo | 2002 | Estadio José "Pepito" Bonano |
| Gulf Coast Texans | Women's Premier Soccer League | — | 2017 | — |