GSI

GSI may refer to:

• Several geographical or geological organisations:
  • Geological Survey of India
  • Geological Survey of Iran
  • Geographical Society of Ireland
  • Geological Survey of Ireland
  • Geological Survey of Israel
  • Geographical Survey Institute of Japan
  • Gemological Science International, a gemstone assessment laboratory
• Geological Strength Index
• Geophysical Service Incorporated, a petroleum exploration corporation
• Gesellschaft für Schwerionenforschung, a German heavy ion research laboratory in Darmstadt, Hesse
• GSI Commerce, a shopping website design company
• GSI Outdoors, an outdoors cookware company
• 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
• Good Shepherd Institute
• Guangzhou Shipyard International, a shipbuilding state-owned enterprise in the People's Republic of China
• Graduate Student Instructor, or teaching assistant
• Gonadosomatic Index
• Global System Interrupt in Advanced Configuration and Power Interface for Intel APIC Architecture.