Education

• Grade point average

• Grace Preparatory Academy, in Arlington, Texas, United States

• Government Polytechnic Amravati, in Maharashtra, India

Government and politics

• Agreement on Government Procurement of the World Trade Organization

• Gambia Ports Authority

• Georgia Ports Authority, in the U.S. state of Georgia

• Government Property Agency, Hong Kong

• Guam Power Authority

• Agreement on Government Procurement

Science and medicine

• Generalized Procrustes analysis

• Gigapascal (GPa), a unit of pressure

• Glenopolar angle

• Gradient pattern analysis

• Granulomatosis with polyangiitis

• Gravida/para/abortus, in medicine

• Gravity Probe A (GP-A), an experiment to test the theory of general relativity

• Guanidinopropionic acid

Sport

• Gaelic Players Association

• Gambia Ports Authority FC

• Gibraltar Petanque Association

• Gibraltar Pistol Association

• Gross Production Average, in baseball

Other uses

• GPA (company), a Brazilian retailer

• Araxos Airport, serving Patras, Greece

• Ford GPA, an amphibious vehicle

• Gay Police Association, in the United Kingdom

• Global Peace Agency, a fictional DC Comics organization

• Guinness Peat Aviation, a defunct Irish company

• GNU Privacy Assistant, a graphical frontend to GNU Privacy Guard