| Gabriel Aguirre | — | Classic Physique | — | — |
| Gabriel Biefnot | — | Men's Physique | — | — |
| Gabriel Castillo | — | Classic Physique | United States | — |
| Gabriel Gariepy | — | Men's Open | — | — |
| Gabriel Ogunmakin | — | Men's Physique | United Kingdom | — |
| Gabriel Zancanelli | "Zanca" | Classic Physique | Brazil | — |
| Gabriela Consolmagno | — | Women's Figure | — | — |
| Gabriela Hejna | — | Women's Figure | — | — |
| Gabriela Linhartova | — | Women's Figure | Czech Republic | — |
| Gabriele Andriulli | — | Men's Wheelchair | — | — |
| Gabriella Messias | — | Bikini | Brazil | — |
| Gabriella Mohamed | — | Bikini | — | — |
| Gabriella Spuhn | — | Ms. Olympia | Germany | — |
| Gabriella Szikszay | — | Ms. Olympia | Hungary | — |
| Gabrielle Messias | — | Bikini | — | — |
| Gage Moran | — | Men's Physique | — | — |
| Garrett Downing | — | Men's Open | — | — |
| Gary Cooper | — | Men's Physique | — | — |
| Gary Leonard | — | Men's Open | — | — |
| Gary Strydom | — | Men's Open | South Africa | — |
| Gaston Bittermann | — | Men's Physique | — | — |
| Gayle Moher | — | Ms. Olympia | United States | — |
| Gaylon Grigsby | — | Men's Wheelchair | United States | — |
| Geder Rocha | — | Men's Physique | — | — |
| Geir Borgan Paulsen | — | Men's Open | Norway | — |
| Gennifer Strobo | — | Women's Figure | — | — |
| Geobanny Paula | — | Men's Physique | — | — |
| Georg Lukas Behringer | — | Men's Open | — | — |
| George Acheampong | — | — | — | — |
| George Brown | — | Men's Physique | United States | — |
| George Farah | — | Men's Open | Lebanon | — |
| George Kawalawu | — | Classic Physique | — | — |
| George Peterson | — | Classic Physique | United States | — |
| George Sellman | — | Men's Physique | — | — |
| Georgia Fudge | — | Ms. Olympia | United States | — |
| Georgian Dragoi | — | Men's Physique | Romania | — |
| Georgina Lona | — | Women's Figure | — | — |
| Gerald Williams | — | Men's Open | United States | — |
| Geraldine Morgan | — | Ms. Olympia | — | — |
| Gerard Buinoud | — | Men's Open | France | — |
| Gergely Arnold | — | — | — | — |
| German David Pacheco | — | Men's Physique | — | — |
| German Pastor | — | Classic Physique | — | — |
| Germier Morgane | — | — | — | — |
| Gessica Brum | — | Bikini | — | — |
| Gessica Brun | — | Bikini | Brazil | — |
| Gessica Campbell | — | Women's Physique | United States | — |
| Giada Simari | — | Women's Figure | — | — |
| Gianluca Di Lorenzo | — | — | — | — |
| Gigi Amurao | — | Bikini | — | — |
| Gil Baptista | — | Men's Physique | — | — |
| Gil Batista | — | Men's Physique | — | — |
| Gildevan Batista Dossantos | — | Men's Physique | — | — |
| Gildevan Dos Santos | — | Men's Physique | — | — |
| Gillian Hodge | — | Ms. Olympia | United Kingdom | — |
| Gillian Ward | — | Women's Physique | — | — |
| Gina Aliotti | — | Women's Figure | — | — |
| Gina Camacho | — | Women's Figure | — | — |
| Giorgia Foroni | — | Women's Fitness | — | — |
| Giovani Emeka | — | Men's 212 | — | — |
| Giovanni Azpeitia | — | Men's Open | — | — |
| Gisa Mendes | — | Women's Figure | — | — |
| Gisela Canelas | — | Bikini | — | — |
| Giselle Machado | — | Women's Wellness | Brazil | — |
| Gisselle Zapata | — | Women's Wellness | — | — |
| Giuditta Taccani | — | Bikini | Italy | — |
| Giuseppe Christian Zagarella | — | Men's 212 | Italy | — |
| Giuseppe Deiana | — | Under 200lbs | Italy | — |
| Giuseppe Riserbato | — | Men's Physique | Italy | — |
| Giuseppe Zagarella | — | Men's 212 | — | — |
| Gladys Portugues | — | Ms. Olympia | United States | — |
| Gloria Bouvier | — | Ms. Olympia | United States | — |
| Gloria Tarpley | — | Women's Figure | — | — |
| Gokhan Eskin | — | Men's Physique | — | — |
| Gorila A | — | Classic Physique | — | — |
| Grant Clemesha | — | Men's Open | — | — |
| Grazia Diliso | — | Women's Figure | — | — |
| Grecia Hernandez | — | Women's Wellness | — | — |
| Greg Kovacs | — | Men's Open | — | — |
| Gregory Dawson | — | Classic Physique | — | — |
| Greta Valentini | — | Women's Wellness | — | — |
| Guerrat Mancef | — | Men's Physique | — | — |
| Guilherme Gualberto | — | Men's Physique | — | — |
| Gulsah Gorgulu | — | Bikini | Turkey | — |
| Gundi Froder | — | Ms. Olympia | Austria | — |
| Günter Schlierkamp | — | Men's Open | Germany | — |
| Gustavo Badell | — | Men's Open | Venezuela | — |
| Guy Cisternino | — | Men's 212 | United States | — |
| Guy Cisternino Jr | — | Men's 212 | United States | — |