GJ or Gj may refer to:
Science and technology edit
- Gigajoule (GJ), a unit of energy
- Gastrojejunal feeding tube, in medicine
- Gliese–Jahreiß Catalogue, in star designators
Transport codes edit
Other uses edit
- Gj (letter), a Latin digraph
- Gebirgsjäger, alpine light infantry of Austria and Germany
- Gharjamai, a live-in son-in-Law
- Gilets jaunes (yellow vests) movement, grassroots political movement in France
- "GJ!", a song by Babymetal on the 2016 album Metal Resistance
- Good Judgment. Business Acronym.