| Squadra | Campionato | Città | Fondazione | Stadio |
|---|---|---|---|---|
| G.S. Riva | — | Riva del Garda | — | — |
| Gad Etna Catania | — | — | — | — |
| Giants Basket Marghera | — | Venezia | — | — |
| Gioiosa Milano | — | — | — | — |
| Giuseppe Rescifina Messina | — | — | — | — |
| Golden State Warriors | National Basketball Association | San Francisco | 1946 | Philadelphia Arena, SAP Center at San Jose, Philadelphia Convention Hall and Civic Center, Cow Palace, Oracle Arena, War Memorial Gymnasium, Bill Graham Civic Auditorium, Chase Center |
| Green Bay Packers | National Football League | — | 1919 | Lambeau Field |
| Grifone Catania | — | Catania | — | — |
| Gruppo Sportivo Disabili Porto Torres | — | Porto Torres | 1996 | — |
| Gruppo Universitario Fascista Agrigento | — | Agrigento | — | — |
| Guardia Republicana | Copa Perú | — | 1981 | Stadio nazionale del Perù |