GSI

GSI may refer to:

Organisations

Geological and geographical

• Geological Survey of India
• Geographical Society of Ireland
• Geological Survey of Ireland
• Geological Survey of Israel, see Jerusalem stone
• Geographical Survey Institute of Japan

Other organisations

• Geophysical Service Incorporated, a petroleum exploration corporation
• Gesellschaft für Schwerionenforschung, a German heavy ion research laboratory
• GSI Commerce, a shopping website design company
• GSI Outdoors, an outdoors cookware company
• Guangzhou Shipyard International, a shipbuilding state-owned enterprise in China

Science and technology

• Geological Strength Index
• Grid Security Infrastructure, a specification for tamperproof computer networks
• Government Secure Intranet, the system for managing secure access to e-mail and other services for UK government departments
• Gonadosomatic Index
• Global System Interrupt, in Advanced Configuration and Power Interface

Other uses

• Graduate student instructor, a teaching fellow