GI or Gi may refer to:

Military

G.I. G.I. are initials used to describe the soldiers of the United States Army and airmen of the United States Air Force and general items of their equipment. The term G.I. has been used as an initialism of "Government Issue", "General Issue", or " ...

, a nickname (from galvanized iron) for U.S. Army soldiers

Arts and entertainment

* ''GI'' (album), an album by the Germs *

Gi (Captain Planet character) ''Captain Planet and the Planeteers'' is an American animated environmentalist superhero television series created by Barbara Pyle and Ted Turner and developed by Pyle, Nicholas Boxer, Thom Beers, Andy Heyward, Robby London, Bob Forward and Ca ...

* ''

Game Informer ''Game Informer'' (''GI'', most often stylized ''gameinformer'' from the 2010s onward) is an American monthly video game magazine featuring articles, news, strategy, and reviews of video games and associated consoles. It debuted in August 1991 w ...

'', a magazine *

Global Icon (band) Global Icon (Hangul: 지아이; acronym An acronym is a word or name formed from the initial components of a longer name or phrase. Acronyms are usually formed from the initial letters of words, as in ''NATO'' (''North Atlantic Treaty Org ...

, a South Korean group

Organisations

* Goethe-Institut, a German cultural association *

General Instrument General Instrument (GI) was an American electronics manufacturer based in Horsham, Pennsylvania, specializing in semiconductors and cable television equipment. They formed in New York City in 1923 as an electronics manufacturer. During the 1950s, ...

, an electronics company *

Gesellschaft für Informatik The German Informatics Society (GI) (german: Gesellschaft für Informatik) is a German professional society for computer science, with around 20,000 personal and 250 corporate members. It is the biggest organized representation of its kind in the ...

, a German computer society * Itek Air (IATA airline designator), a former airline based in Kyrgyzstan *

Guaranteed Irish Guaranteed Irish is an Irish nonprofit business membership organisation representing indigenous and international businesses operating in Ireland. The Guaranteed Irish symbol is awarded to companies which create "quality" jobs, contribute to l ...

, a business membership network

Science and technology

* GI, a complexity class in the

graph isomorphism problem The graph isomorphism problem is the computational problem of determining whether two finite graphs are isomorphic. The problem is not known to be solvable in polynomial time nor to be NP-complete, and therefore may be in the computational compl ...

Galvanized iron Galvanization or galvanizing ( also spelled galvanisation or galvanising) is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which the parts are submerged ...

Biology and medicine

* G_i alpha subunit, a protein * Gastrointestinal tract (GI tract) *

Gigantocellular reticular nucleus The gigantocellular reticular nucleus (Gi) is a subregion of the medullary reticular formation. As the name indicates, it consists mainly of so-called giant neuronal cells. This nucleus has been known to innervate the caudal hypoglossal nucleus, ...

, a subregion of the medullary reticular formation *

Glycemic index The glycemic (glycaemic) index (GI; ) is a number from 0 to 100 assigned to a food, with pure glucose arbitrarily given the value of 100, which represents the relative rise in the blood glucose level two hours after consuming that food. The GI of ...

, measuring a food's effect on blood glucose

Computing

.gi .gi is the country code top-level domain A country code top-level domain (ccTLD) is an Internet top-level domain generally used or reserved for a country, sovereign state, or dependent territory identified with a country code. All ASCII ...

, the country code top-level domain for Gibraltar *

Gi (prefix symbol) A binary prefix is a unit prefix for multiples of Units of measurement, units. It is most often used in data processing, data transmission, and digital information, principally in association with the bit and the byte, to indicate multiplicatio ...

(gibi), a binary prefix *

Global illumination Global illumination (GI), or indirect illumination, is a group of algorithms used in 3D computer graphics that are meant to add more realistic lighting to 3D scenes. Such algorithms take into account not only the light that comes directly fro ...

, a group of 3D graphics algorithms

Other uses

Gibraltar ) , anthem = " God Save the King" , song = " Gibraltar Anthem" , image_map = Gibraltar location in Europe.svg , map_alt = Location of Gibraltar in Europe , map_caption = United Kingdom shown in pale green , mapsize = , image_map2 = Gib ...

(ISO 3166-1 country code) * G.I. Generation, a demographic cohort *

Graphics Interface The Graphics Interface (GI) conference is the oldest continuously scheduled conference devoted to computer graphics, and human–computer interaction. GI was held biannually between 1969 and 1981, and has been held annually since then. Prior to 1982 ...

, a conference on computer graphics and human–computer interaction *

Geographical indication A geographical indication (GI) is a name or sign used on products which corresponds to a specific geographical location or origin (e.g., a town, region, or country). The use of a geographical indication, as an indication of the product's source, ...

, on products which corresponds to a geographical location or origin *

Gi (kana) き, in hiragana, キ in katakana, is one of the Japanese kana, which each represent one mora. Both represent and are derived from a simplification of the kanji. The hiragana character き, like さ, is drawn with the lower line either conn ...

, a syllabic character in Japanese script *

Gi (cuneiform) The cuneiform gi sign is a common multi-use sign of the ''Epic of Gilgamesh'', the 1350 BC Amarna letters, and other cuneiform texts. It also has a sumerogrammic usage for GI in the ''Epic of Gilgamesh''. The structure of the cuneiform sig ...

, a sign in cuneiform writing *

Greg Inglis Gregory Paul Inglis (born 15 January 1987), also known by the nickname of "G.I.", is a retired Australian professional rugby league footballer. His regular playing positions were Centre, Fullback, Five-eighth and Wing. From 2011 to 2019 he pl ...

(born 1987), Australian rugby league footballer *

Keikogi (, "practice", , "dress or "clothes"), also known as or , is a traditional uniform worn for training in Japanese martial arts and their derivatives. Emerging in the late 19th century, the was developed by judo founder Kanō Jigorō. Origin Ja ...

, a Japanese martial arts uniform known in English simply as a ''gi''. *Gi, a character from

Captain Planet and the Planeteers ''Captain Planet and the Planeteers'' is an American animated environmentalist superhero television series created by Barbara Pyle and Ted Turner and developed by Pyle, Nicholas Boxer, Thom Beers, Andy Heyward, Robby London, Bob Forward and Ca ...