GSI

GSI may refer to:

Science and technology

For scientific organizations, see § Scientific organizations.

• Geological Strength Index
• Gonadosomatic Index
• UK Government Secure Intranet
• Grid Security Infrastructure, a computer networking specification
• "Global Systems Integrator", large managed technology services providers

Businesses and organizations

Businesses

• Gemological Science International, gemstone identification/grading/appraisal services
• Geophysical Service Incorporated, an American petroleum exploration corporation
• Guangzhou Shipyard International, a Chinese state-owned shipbuilder
• GSI Commerce, now eBay Enterprise, an American e-commerce company

Scientific organizations

• GSI Helmholtz Centre for Heavy Ion Research, Germany
• Geographical Society of Ireland
• Geospatial Information Authority of Japan
• Geological Survey of India
• Geological Survey of Ireland

Other organizations

• Global Security Initiative
• Gabinete de Segurança Institucional da presidência da república (Institutional Security Cabinet), Brazil
• Gustav Stresemann Institute, a German educational charity

Other uses

• Graduate student instructor, a teaching fellow at some US universities
• Grand-Santi Airport, French Guiana (IATA code GSI)