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- Gamastone Stinkwater Hammanskraal Taxi Association (GSHTA)
- Game Abattoirs and Meat Establishments of South Africa (GAMESA)
- Game Rangers Association of Africa (GRAA)
- Garden Centre Association (GCA)
- Garden Route Employers Association (GREA)
- Garden Route Taxi Association (GRTA)
- Gate and Fence Association (GAFA)
- Gauteng Canoe Union (GCU)
- Gauteng Central Tennis Association (GCTA)
- Gauteng Deaf Football Association (GDFA)
- Gauteng Growth and Development Agency (GGDA)
- Gauteng Hunters Federation (GHF)
- Gauteng Infection Control Society (GICS)
- Gauteng Institute for Architecture (GIFA)
- Gauteng North Junior Tennis (GNJT)
- Gauteng Pedal Power Association (GPPA)
- Gauteng Society of Advocates (GSA)
- Gauteng West Rand Taxi Association (GWRTA)
- Gauteng Women in Insurance (GWII)
- Genealogical Society of South Africa (GISA)
- General Council of The Bar of South Africa (GCBSA)
- General Industries Workers Union of South Africa (GIWUSA)
- General Public Service Sectoral Bargaining Council (GPSSBC)
- General, Domestic & Professional Employers Organisation of South Africa (GDPEO)
- Generic and Biosimilar Medicines of Southern Africa (GBMSA)
- Geo-Information Society of South Africa (GISSA)
- Geological Society of South Africa (GSSA)
- George Business Chamber (GBC)
- Geostatistical Association of South Africa (GASA)
- Geosynthetics Interest Group of South Africa (GIGSA)