GF, gf or gF may refer to:
- Airline codes
- French Guiana (ISO 3166 country code: GF)
- Gulf Air (IATA airline designator: GF)
- Sierra Leone (ICAO airport designator prefix: GF)
- Companies and organizations
- +GF+, an abbreviation for the Swiss company Georg Fischer
- GlobalFoundries
- Grafiska Fackförbundet - Mediafacket, the Swedish Graphic Workers' Union
- GF Securities, one of the largest financial institutions in P.R.China
- Computing, maths, and science
- Cyclosarin nerve gas (NATO designation: GF)
- Fermi's constant, GF
- Fluid intelligence as opposed to gC, crystallized intelligence
- Galois field
- GF method, Wilson's normal mode analysis
- Gluten Free
- Gram force (symbol: gf)
- Grammatical Framework, a type-theoretic grammar formalism
- Greater fool
- Growth factor in biology
- Other
- Girlfriend, internet slang
- Goals for, ice hockey statistic
- GuitarFreaks