Gak or GAK may refer to:

People Akoldah Gak (born 2002), Australian basketball player, brother of Gorjuk Gak Gorjok Gak (born 1996), Egyptian-born Australian basketball player Huh Gak (born 1984), South Korean singer Kim Gak (1536–1610), Korean military officer and poet Gak Jonze (born 1982), stage name of English rapper Micah Lei

Places Ağdam, Khojavend (also Gak), a village in the Khojavend Rayon of Azerbaijan Gak, South Sudan, a boma in Kolnyang payam, Bor South County, Jonglei State

Other uses GAK (EP), a 1994 recording by Richard D. James GAK (protein), a serine/threonine kinase that in humans is encoded by the GAK gene Gamkonora language (ISO 639-3 code: gak), a North Halmahera language of Indonesia , an Austrian sports club Nickelodeon Gak/Floam, a 1990s children's toy (a non-Newtonian fluid made from guar gum, like Silly Putty/Slime)

See also Gac (disambiguation)