- Gabon (Football)
- Gabriel Rosado (Boxing)
- Gainsborough Trinity (Football)
- GAIS (Football)
- Gala Fairydean (Football)
- Galal Yafai (Boxing)
- Galatasaray (Football)
- Galatasaray Women (Football)
- Galle (Cricket)
- Galle Cricket Club (Cricket)
- Galle Marvels (Cricket)
- Galle Titans (Cricket)
- Galway (Hurling)
- Galway (Gaelic Football)
- Gamal Yafai (Boxing)
- Gambia (Football)
- Gambia (Cricket)
- Gardner-Webb (American Football)
- Gardner-Webb (Basketball)
- Gary O'Sullivan (Boxing)
- Gary Russell Jr (Boxing)
- Gateshead (Football)
- Gateshead Ladies (Football)
- Gauteng (Cricket)
- Gauteng Women (Cricket)
- Gazi Group Chattogram (Cricket)
- Gazi Group Cricketers (Cricket)
- Gazi Tyres Cricket Academy (Cricket)
- Gaziantep (Football)
- Gaziantepspor (Football)
- Gazisehir Gaziantep (Football)
- GB Women (Football)
- GD Chaves (Football)
- Geelong Cats (Australian Rules Football)
- Geelong United (Basketball)
- Gefle IF (Football)
- Gemcon Khulna (Cricket)
- Gençlerbirligi (Football)
- Genk (Football)
- Gennady Golovkin (Boxing)
- Genoa (Football)
- George Kambosos Jr (Boxing)
- George Mason (Basketball)
- Georgetown (Basketball)
- Georgia (Football)
- Georgia (Tennis)
- Georgia (Rugby Union)
- Georgia (American Football)
- Georgia (Basketball)
- Georgia (Handball)
- Georgia Southern (American Football)
- Georgia State (American Football)
- Georgia State (Basketball)
- Georgia Tech (American Football)
- Georgia Tech (Basketball)
- Georgia U20 (Rugby Union)
- Georgia U21 (Football)
- Georgia Women (Football)
- Germany (Football)
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- Germany (Tennis)
- Germany (Basketball)
- Germany (Cricket)
- Germany (Rugby League)
- Germany (Volleyball)
- Germany (Hockey)
- Germany (Handball)
- Germany U19 (Football)
- Germany U21 (Football)
- Germany Women (Football)
- Germany Women (Cricket)
- Germany Women (Lacrosse)
- Germany Women (Hockey)
- Germany Women (Volleyball)
- Germany Women (Basketball)
- Gervonta Davis (Boxing)
- Getafe (Football)
- GFK Tikvesh (Football)
- Ghana (Football)
- Ghana (Cricket)
- Ghani Glass (Cricket)
- Gianluca Ceglia (Boxing)
- Giants Netball (Netball)
- Gibraltar (Football)
- Gibraltar (Netball)
- Gibraltar U21 (Football)
- Gibraltar Women (Football)
- GIF Sundsvall (Football)
- Giffnock SC Women (Football)
- Gil Vicente FC (Football)
- Gilberto Ramirez (Boxing)
- Gillingham (Football)
- Gillingham Ladies (Football)
- Ginjiro Shigeoka (Boxing)
- Giovanni De Carolis (Boxing)
- Giresunspor (Football)
- Girona (Football)
- Girvan (Football)
- Gjilani (Football)
- Glamorgan (Cricket)
- Glamorgan 2nd XI (Cricket)
- Glamorgan Women (Cricket)
- Glasgow City Women (Football)
- Glasgow Clan (Ice Hockey)
- Glasgow Giants (Cricket)
- Glasgow University (Football)
- Glasgow Warriors (Rugby Union)
- Glasgow Warriors Women (Rugby Union)
- Glenelg (Australian Rules Football)
- Gleniffer Thistle Ladies (Football)
- Glenorchy Knights FC (Football)
- Glentoran (Football)
- Gloucester Rugby (Rugby Union)
- Gloucester United (Rugby Union)
- Gloucester-Hartpury Women's RFC (Rugby Union)
- Gloucestershire (Cricket)
- Gloucestershire 2nd XI (Cricket)
- Gloucestershire Women (Cricket)
- Gnistan (Football)
- Go Ahead Eagles (Football)
- Goa (Cricket)
- Goa Women (Cricket)
- Godavari Titans (Cricket)
- Gold Coast Suns (Australian Rules Football)
- Golden State Valkyries (Basketball)
- Golden State Warriors (Basketball)
- Golspie Sutherland (Football)
- Goltay Cricket Academy (Cricket)
- Gomel (Football)
- Gonzaga (Basketball)
- Governor-General XI Women (Cricket)
- Göztepe (Football)
- Grambling (American Football)
- Grambling (Basketball)
- Grampian Ladies (Football)
- Granada (Football)
- Grand Canyon (Basketball)
- Grand Canyon Antelopes (Baseball)
- Grand Cayman Jaguars (Cricket)
- Great Britain (Ice Hockey)
- Great Britain (Tennis)
- Great Britain (Basketball)
- Great Britain (Baseball)
- Great Britain (Hockey)
- Great Britain Women (Hockey)
- Great Britain Women (Basketball)
- Great Wakering Rovers (Football)
- Greece (Football)
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- Greece (Rugby League)
- Greece (Handball)
- Greece U21 (Football)
- Greece Women (Football)
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- Green Bay (Basketball)
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- Greenock Morton FC Women (Football)
- Grenada (Football)
- Grenada (Netball)
- Grenada (Cricket)
- Grenoble (Football)
- Grenoble (Rugby Union)
- Gretna 2008 (Football)
- Greuther Furth (Football)
- Griffons (Rugby Union)
- Grimsby Town (Football)
- Griquas (Rugby Union)
- Groningen (Football)
- Guadalajara (Football)
- Guadalajara Femenil (Football)
- Guadeloupe (Football)
- Guangzhou (Football)
- Guangzhou City (Football)
- Guatemala (Football)
- Guatemala (Tennis)
- Guildford Flames (Ice Hockey)
- Guillermo Rigondeaux (Boxing)
- Guinea (Football)
- Guinea-Bissau (Football)
- Guingamp (Football)
- Guiseley (Football)
- Guiseley AFC Vixens (Football)
- Gujarat (Cricket)
- Gujarat Giants (Cricket)
- Gujarat Giants Women (Cricket)
- Gujarat Titans (Cricket)
- Gujarat Women (Cricket)
- Gujranwala Giants (Cricket)
- Gulbarga Mystics (Cricket)
- Gulf Giants (Cricket)
- Gulshan Cricket Club (Cricket)
- Gustavo Lemos (Boxing)
- Guwahati Avengers (Cricket)
- Guyana (Football)
- Guyana (Cricket)
- Guyana Amazon Warriors (Cricket)
- Guyana Amazon Warriors Women (Cricket)
- Guyana Women (Cricket)
- Gwadar Sharks (Cricket)
- Gwalia Lightning (Rugby Union)
- Gwalia United FC (Football)
- GWS Giants (Australian Rules Football)
- Gzira United (Football)