GK or Gk may refer to:
Businesses and organizations Gallien-Krueger, an instrument amplifier company Gawad Kalinga, an anti-poverty movement based in the Philippines Society for Orthodontic Dental Technology (German: ), a professional body based in Germany Jetstar Japan's IATA designator
People G. K. Chesterton, a Roman Catholic novelist and author GK Barry, English influencer and presenter GK (art director) (Gopi Kanth), Indian art director
Places Gadobangkong railway station, a railway station in West Bandung Regency, Indonesia Geilenkirchen, a city in North Rhine-Westphalia, Germany, by vehicle registration code until 1971 Graham-Kapowsin High School, in Pierce County, Washington Greater Kailash, New Delhi, India Guernsey (FIPS PUB 10-4 territory code)
Sports Goalkeeper, a designated player protecting the goal in team sports Goalkeeper (association football) Goalkeeper (handball) Goal keeper (netball) Goalkeeper (water polo) Vegas Golden Knights of the National Hockey League
Other uses Glucokinase, an enzyme that facilitates phosphorylation of glucose to glucose-6-phosphate Gōdō gaisha, a type of Japanese business organization GK, the gene encoding Glycerol kinase, a phosphotransferase enzyme Guntur Kaaram, a 2024 Indian Telugu-language action drama film by Trivikram Srinivas General knowledge, various information accumulated over time without specialized study