# Gem (disambiguation)

A gem, or gemstone, is a cut rock or mineral.
Gem or GEM may also refer to:

## Arts, entertainment and media
### Fictional characters

* Gem Reeves, in Neighbours
* Gem, in Star Trek's "The Empath"
* Gem, in Tron: Legacy
* Gem, in Power Rangers RPM
* Gems, aliens in Steven Universe
* Gems, in Land of the Lustrous

### Music

* GEM (band), a Japanese idol girl group
* Gem (American band), with Doug Gillard
* Gem (Dutch band), a rock band
* G.E.M. (Gloria Tang Sze-wing, born 1991), a Chinese singer-songwriter
** G.E.M. (EP), 2008
* Gem (album), by Beni Arashiro, 2007
* "The Gem", a song by Priestess from the 2009 album Prior to the Fire

### Other uses in arts, entertainment and media

* "Gem", a 2006 episode of TV series The Inside
* The Gem, an early 20th-century British story paper
* Gem Theatre (disambiguation)
* Gem TV (disambiguation), the name of several broadcasters

## Businesses and organisations

* GEM Motoring Assist, a British road safety and breakdown recovery organisation
* G. E. M. Membership Department Stores, a chain of discount stores in the U.S. and Canada
* Global Electric Motorcars, an American manufacturer of low-speed vehicles
* GEM, musical instruments by Generalmusic
* Global Earthquake Model, a public–private partnership to develop risk assessment software
* Gordon–Evernham Motorsports, a NASCAR Busch Series race team
* Grenoble École de Management, a French graduate business school

## People

* Gem Archer (born 1966), English musician
* Harry Gem (1819–1881), English lawyer, soldier, writer and sportsman

## Places
### United States

* Gem, Kansas
* Gem County, Idaho
* Gem, Indiana
* Gem, Ohio
* Gem, Texas
* Gem, West Virginia
* Gem Glacier, Glacier National Park, Montana
* Gem Valley, Idaho
* Gem Lake (Flathead County, Montana)
* Lake Gem (Florida)

### Elsewhere

* Gem, Alberta, Canada
* Gem Lake (Vancouver Island), British Columbia, Canada
* Gem Constituency, Kenya

## Science and technology

* GEM (gene), GTP-binding protein
* Gem, a format of the RubyGems package manager for Ruby
* Gem, codename for the PlayStation Move controller
* Gem, the game engine of Best Way
* GEM of Egypt, a power shovel used for strip mining
* Geminal, in chemistry
* Gemini (constellation), in astronomy
* Gas electron multiplier, a type of gaseous ionization detector
* German equatorial mount, for astronomical telescopes and cameras
* GEM (desktop environment) (Graphics Environment Manager), a software operating environment from Digital Research
* GEM, a compiler backend created for DEC MICA and later used in OpenVMS and Tru64.
* Graphics Environment for Multimedia, graphics software
* Global Environmental Multiscale Model, a meteorological forecasting system
* Globally Executable MHP, a DVB specification for TV
* Graphics Execution Manager, video software
* Graphite-Epoxy Motor, a series of solid rocket boosters
* Gravitoelectromagnetism, formal analogies between the equations for electromagnetism and relativistic gravitation
* Gyrokinetic ElectroMagnetic, a plasma turbulence simulation
* SECS/GEM, semiconductor's equipment interface protocol for equipment-to-host data communications

## Transportation and military

* Gem (automobile), by the Gem Motor Car Company 1917–1919
* Rolls-Royce Gem, a helicopter engine
* Gem 4/4, a Rhaetian Railway locomotive class
* Ground effect machine (GEM), a hovercraft
* USS Gem (SP-41), a U.S. Navy patrol vessel 1917-1919

## Other uses

* Gem (moth), of the family Geometridae
* Billbergia 'Gem', a hybrid cultivar
* Gem, the commonest paper clip design
* Gender Empowerment Measure, an index designed to measure of gender equality
* Generalized Expertise Measure, a psychometric measure of expertise
* Global Entrepreneurship Monitor, a research project into entrepreneurial activity
* Grand Egyptian Museum, or the Giza Museum, a planned museum of artifacts of ancient Egypt
* Growth Enterprise Market, a board of the Stock Exchange of Hong Kong