GEM

GEM, written with all capital letters, may refer to:

Music

9Gem, an Australian free-to-air TV channel that used to be known as GEM
GEM TV, a Persian-language entertainment satellite channel headquartered in Dubai
GEM TV, an alternate name for DZCE-TV, a religious TV station in the Philippines
Globally Executable MHP, a digital television specification

Gender Empowerment Measure, indicator used by the United Nations as a measure of inequalities between men's and women's opportunities in a country
Generalized Expertise Measure, psychometric measure of perception of employee expertise
Global Entrepreneurship Monitor, a global report regarding the level of nascent entrepreneurship
Grenoble école de management, incorporating Grenoble Graduate School of Business (GGSB)
Growth Enterprise Market of the Hong Kong Stock Exchange

G. E. M. Membership Department Stores, chain of discount stores in the United States and Canada
GEM Motoring Assist, a road safety and breakdown recovery organisation
Generalmusic, an Italian manufacturer of organs, synths and keyboards, formerly 'Galanti Electro Music'
Global Earthquake Model, a public-private partnership initiated in 2006 by the Global Science Forum of the OECD to develop global, open-source risk assessment software and tools
Global Electric Motorcars, manufacturer of electric cars and subsidiary of Polaris
Gordon/Evernham Motorsports, NASCAR racing team
Grand Egyptian Museum, museum in Giza

Globally Executable MHP, an ETSI standard for interactive TV middleware based on Java
GPON encapsulation method, a method of encapsulation for passive optical network traffic
Graphical Environment Manager, a windowing system created by Digital Research, Inc. in the 1980s
Graphics Environment for Multimedia, a plugin providing 3D graphics for Pure Data
Graphics Execution Manager, a Kernel-based graphics memory manager found in Linux

GEM (gene), in humans
Generic Equipment Model, a standard used by the semiconductor industry
Global Environmental Multiscale Model, weather forecasting and data assimilation system
Glycosphingolipid-enriched microdomains, also known as lipid raft, the plasma membrane of a cell
Gravitoelectromagnetism, in physics, deals with the theory of field effects due to moving masses
Gyrokinetic ElectroMagnetic, in plasma physics, a gyrokinetic plasma turbulence simulation

Gas Electron Multiplier, gaseous ionization detector
German equatorial mount, type of mounting system for a telescope
Graphite-Epoxy Motor, a solid rocket motor used for supplemental thrust on several space launch vehicles