Educational Content: This article is for informational purposes only and does not constitute medical advice. Always consult a healthcare provider for diagnosis and treatment.
Definition of GI
Medically reviewed by Min Clinic Staff | Updated: January 2026
GI: 1. In medicine, commonly used abbreviation for gastrointestinal, referring collectively to the stomach and the small and large intestine.
2. Outside of medicine, GI may stand for galvanized iron, general issue or government issue (as in GI Joe).