# List of doping cases in sport (G)

This is a sub-list from List of doping cases in sport representing a full list of surnames starting with G.
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| Name | Country | Event | Banned substance(s) |
| Mohammed Gaber | Egypt | Weightlifting | |
| Ivailo Gabrovski | Bulgaria | Cycling | EPO |
| Al-Saadi Gaddafi | Libya | Football (soccer) | Nandrolone |
| Éric Gagné | Canada | Baseball | Human growth hormone |
| Alexander Gaidukov | Russia | Water polo | Carphedon |
| Aaron Galindo | Mexico | Football (soccer) | Nandrolone |
| Luiza Galiulina | Uzbekistan | Gymnastics | Furosemide |
| Gao Yanzhi | China | Weightlifting | |
| Ismael Garcia Bravo | Spain | Swimming | Ephedrine |
| Sergio Garcia Ortiz | Spain | Swimming | |
| Juan Garriga | Spain | Motorcycle racing | (never sanctioned; admitted to use after the end of his career) |
| Lukasz Gasior | Poland | Swimming | Cannabis |
| Richard Gasquet | France | Tennis | Cocaine (later forgiven by the excuse that he kissed a girl who used cocaine) |
| Stefano Garzelli | Italy | Cycling | Probenecid |
| Philippe Gaumont | France | Cycling | Erythropoietin (EPO) (self-admitted) |
| Michael Gausman | United States | Swimming | Cannabinoids |
| Vikas Singh Gautam | France | Volleyball | Steroids |
| Anzhelika Gavrilova | Kazakhstan | Speed skating | Clenbuterol |
| Pauline Gendrier | France | Volleyball | Cocaine |
| Ivan Gertlein | Russia | Pole vaulting | DHEA |
| Sylvain Georges | France | Cycling | Heptaminol |
| Tihomir Georgiev | Bulgaria | Volleyball | Cannabinoids |
| Amanda Gerhart | Canada | Wrestling | Refusal to submit to doping test |
| Dinko Geshev | Poland | Swimming | Cannabis |
| Ute Geweniger | East Germany | Swimming | Turinabol (self-admitted) |
| Alireza Gharibi | Iran | Wrestling | D-methamphetamine |
| Jason Giambi | United States | Baseball | Human growth hormone, steroids (self-admitted) |
| Jeremy Giambi | United States | Baseball | Human growth hormone, steroids (self-admitted) |
| Jay Gibbons | United States | Baseball | Growth hormone |
| Lewis Gibbons | United Kingdom | Football (soccer) | Benzoylecgonine, cannabis |
| Jack Gibbs | United Kingdom | Wheelchair basketball | |
| Monica Gibellini | Italy | Water polo | Cannabinoids |
| Ed Giddins | England | Cricket | Cocaine |
| Lukasz Giminski | Poland | Swimming | |
| Felice Gimondi | Italy | Cycling | |
| Everton Giovanella | Brazil | Football (soccer) | |
| Christopher Girard | Canada | Water polo | Cannabis |
| Mads Glaesner | Denmark | Swimming | Levomethamphetamine |
| Martin Gleeson | United Kingdom | Rugby | Methylhexaneamine |
| Josh Glenn | Australia | Australian rules football | 19-Norandrosterone, 19-Noretiocholanolone |
| Ekaterina Gnidenko | Russia | Cycling | Dehydrochlormethyltestosterone (Turinabol) |
| Anthony Gobert | Australia | Motorcycle racing | Cannabis (Not sanctioned for first offence, but was released from contract by team) |
| Luis Pereira Melo Godinho | Portugal | Volleyball | Cannabinoids |
| Babak Goldasteh | Iran | Wrestling | Anabolic steroids |
| Andreas Goldberger | Austria | Ski jumping | Cocaine |
| Daria Goltsova | Russia | Weightlifting | Cocaine |
| Joellison Viana de Silva Gomez | Brazil | Weightlifting | Methylhexaneamine |
| Kerem Gönlüm | Turkey | Basketball | Cathine |
| Derlis Gómez | Paraguay | Football (soccer) | Coca |
| Aitor González | Spain | Cycling | Methyltestosterone metabolite |
| Dee Gordon | United States | Baseball | Exogenous Testosterone and Clostebol |
| Dwight Gooden | United States | Baseball | Cocaine |
| Besarion Goshashvili | Georgia | Wrestling | Furosemide |
| Anna Gostomelsky | Israel | Swimming | Prednisolone |
| Ólafur Gottskálksson | Iceland | Football (soccer) | |
| Lauren Goulart | Brazil | Swimming | Methylhexaneamine |
| Royce Gracie | Brazil | Mixed martial arts | Nandrolone metabolite |
| Sam Grammer | United States | Highland Games | |
| Johan Granath | Sweden | Speed skating | Unknown substance |
| Guy Greavette | Canada | Weightlifting | Anabolic steroids |
| Robbie Green | United Kingdom | Darts | Cannabis |
| Elen Grigoryan | Armenia | Weightlifting | Methandienone |
| Jason Grimsley | United States | Baseball | Amphetamines, anabolic steroids, human growth hormone, (self-admitted) |
| Kevin Grubb | United States | Auto Racing | Refusal to submit to doping control |
| Firas Guachai | Tunisia | Swimming | Testosterone |
| Pep Guardiola | Spain | Football (soccer) | Nandrolone |
| Elzo Guerra Aranoz | Chile | Weightlifting | Methandienone |
| Melvin Guillard | United States | Mixed martial arts | Cocaine |
| Zafar Guliyev | Russia | Wrestling | Bromantan |
| Fabrizio Guidi | Italy | Cycling | Erythropoietin (EPO) |
| Zahid Gulfam | Pakistan | Cycling | Nandrolone |
| Ari Gunnarsson | Iceland | Swimming | 19-Norandrosterone |
| Mathias Gunthar | Sweden | Wrestling | Furosemide |
| Guo Tianxin | China | Weightlifting | Clenbuterol |
| Carlos Gurpegi | Spain | Football (soccer) | 19-norandrosterone |
| Keith Gurusinghe | Sri Lanka | Rugby union | Methylhexanamine |
| Rebeca Gusmão | Brazil | Swimming | Testosterone; Tampering |
| Ferenc Gyurkovics | Hungary | Weightlifting | Oxandrolone |