Read the dictionary definition of gi. All definitions for this word.
1. (law) a name or sign used on certain products which corresponds to a specific geographical location or origin
2. a unit of magnetomotive force equal to 0.7958 ampere-turns
3. clean in preparation for inspection
1. the soldiers GIed the barracks
4. of or relating to the stomach and intestines
1. a gastrointestinal disorder
See also: Merriam-Webster definition of gi