GSI may refer to:

Science and technology

Gonadosomatic Index In biology, the gonadosomatic index (GSI) is the calculation of the gonad mass as a proportion of the total body mass. It is represented by the formula: GSI = onad weight / total tissue weight× 100 It is a tool for measuring the sexual maturit ...

* UK Government Secure Intranet * Grid Security Infrastructure, a computer networking specification * "Global Systems Integrator", large managed technology services providers * GS-I (Cellulose synthase (UDP-forming)), an enzyme * Great Sea Interconnector

Businesses and organizations

Businesses

* Gemological Science International, gemstone identification/grading/appraisal services *

Geophysical Service Incorporated Geophysical Service Inc. (often abbreviated GSI) was a Texas-based company founded by J. Clarence Karcher, John Clarence Karcher and Eugene McDermott in 1930, for the purpose of using refraction and reflection seismology to Hydrocarbon explorati ...

, 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 The GSI Helmholtz Centre for Heavy Ion Research () is a federally and state co-funded heavy ion () research center in Darmstadt, Germany. It was founded in 1969 as the Society for Heavy Ion Research (), abbreviated GSI, to conduct research on a ...

, Germany * Geographical Society of Ireland *

Geospatial Information Authority of Japan The , or GSI, is the national institution responsible for surveying and mapping the national land of Japan. The former name of the organization from 1949 until March 2010 was Geographical Survey Institute; despite the rename, it retains the same ...

Geological Survey of India The Geological Survey of India (GSI) is a scientific agency of India. It was founded in 1851, as a Government of India organization under the Ministry of Mines, one of the oldest of such organisations in the world and the second oldest survey ...

Geological Survey of Ireland Geological Survey Ireland or Geological Survey of Ireland (), founded in 1845, is the National Earth Science agency of Ireland. Overview Geological Survey Ireland is a division of the Department of Communications, Climate Action and Environment a ...

Other organizations

Global Security Initiative The Global Security Initiative (GSI, ) is an initiative proposed by Chinese Communist Party general secretary Xi Jinping during the annual Boao Forum on 21 April 2022. Officially, the initiative is meant to "uphold the principle of indivisible ...

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

Other uses