GI

GI, Gi or gi may refer to:
* Galvanized iron - iron that has been electrochemically rustproofed with zinc.
* Game Informer - a video games magazine
* Gary, Indiana - a city in Northwest Indiana
* Gastrointestinal - a division of the human anatomy in medicine
* Generic identifier
* Geodætisk Institut - a former Danish cartographic institute
* Geographical indication
* General Instrument - an electronics company
* Gibi or Gi, the IEEE prefix thaat represents 2³⁰* Gi (Captain Planet character) - a character in the television series Captain Planet and the Planeteers
* (GI) - an album by The Germs
* Government_issue or G.I., a nickname for a United States Army soldier.
* G.I. Joe - a toy soldier series manufactured by Hasbro
* G.I. (comics) - a reference to Genetic Infantryman in the Rogue Trooper fictional universe
* .gi, Gibraltar's country code top-level domain
* Gibraltar, the country
* Gilbert (Gb or Gi), a former CGS unit of magnetomotive force or magnetic potential
* Gill, a U.S. unit of volume equal to 4 U.S. fluid ounces and an Imperial unit equal to 5 imperial fluid ounces
* Government Issue, a 1980's hardcore band
* Global illumination, the rendering of light in 3D computer graphics scenes
* Global income
* Glycemic index, a ranking system for carbohydrates based on their effect on blood glucose levels
* Graded index
* Grand Island, Nebraska, an American city
* Graph isomorphism problem and the complexity class of problems reducible to it
* Itek Air, IATA airline designator
* Keikogi or "Gi", the clothing worn in judo, karate, and other Japanese martial arts