GJ or Gj is an abbreviation that can refer to the following:

Gujarat, abbreviation used by Gujarat State (India) Regional Transportation Office for Gujarat State Code

George Jones, used as his logo

Glassjaw, a band

Grand Junction, Colorado, a major city in Western Colorado

George Jones summary and related information.

Eurofly IATA airline designator

Gharjamai, a live-in Son-in-Law

Gj (letter)

Generic Java programming language

gigajoule (GJ), an SI unit of energy equal to 10⁹ joules

Gliese-Jahreiss star catalogue originally compiled by Wilhelm Gliese

An online gaming or instant messaging abbreviation corresponding to "good job", sometimes used in a sarcastic manner

grapefruit juice or grape juice

Grimmjow Jeagerjaques from the anime/manga Bleach