GPI

• GP1 (disambiguation)
• Gemini Planet Imager
• Gender Parity Index
• General paresis of the insane
• Generalized Policy Iteration
• Generic Product Identifier
• Genuine progress indicator
• George Padmore Institute
• Gibson Plumage Index
• Glacier Park International Airport
• Glass Packaging Institute
• Global Address Space Programming Interface
• Global Partnership Initiative
• Global Peace Index
• Global Poker Index
• Global Press Institute
• Glucose-6-phosphate isomerase
• Glycosylphosphatidylinositol
• Godfrey Phillips India
• Grains per inch
• Granite Peak Installation
• Greenfield Park Primary International School
• Guapi Airport
• Gurley Precision Instruments
• Internal globus pallidus