GM

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Transportation

General Motors, American automobile manufacturing company, founded September 16, 1908
- 2009–2011: Motors Liquidation Company
Zhejiang Geely Ming Industrial Co., Ltd. (Template:Langx, common known as GM Motor), a motorcycle manufacturer founded in 1995
GM chassis or Gusenichnaya Machina, a Russian tracked vehicle chassis
Google Maps, a web mapping service that can compute routes between places

RGM-79 GM, a mobile suit series in the video game Mobile Suit Gundam
Gamemaster or game master, a person officiating in a multiplayer role-playing game
Grandmaster (chess)
GM (magazine)
Gunn & Moore, British sports equipment company

Genetic modification or genetically modified, manipulation of an organism's genome
Silty gravel, in the Unified Soil Classification System
Standard gravitational parameter $μ = G M$
The multiplicative group scheme, denoted G_m
Metacentric height, the distance between the center of gravity (G) and the metacenter (M) of a ship
Göttinger Miszellen, a scientific journal published by the Seminar für Ägyptologie und Koptologie (seminar for Egyptology and Coptology) of the University of Göttingen, Germany

Transconductance (short for transfer conductance) or mutual conductance, denoted g_m, an electronic component parameter
General MIDI (GM or GM 1), a standardized specification for Musical Instrument Digital Interface synthesizers, developed by the American MIDI Manufacturers Association (MMA) and the Japan MIDI Standards Committee (JMSC) and first published in 1991
Golden master, a stage in the software release life cycle, referring to a version to be distributed to customers, i.e. ready for release to manufacturing (RTM)
GraphicsMagick, a fork of ImageMagick

Geiger–Müller tube or G-M tube, a type of radiation detector
Gigametre or gigameter (Gm), one billion metres
GM, a unit of two-photon absorption cross-section, named after Maria Goeppert Mayer
Gram or gramme (historically sometimes abbreviated "gm", but now usually "g"), a metric unit of mass

Gm (digraph), pair of letters used in English for certain Greek words
G minor, chords and scale in music
General manager in business
Grand Marshal (RPI), the highest elected student leader of Rensselaer Polytechnic Institute
Grant-maintained school, a kind of state school in England and Wales, 1988–1998
Genital mutilation
George Medal, a UK, primarily civil, decoration for acts of great bravery
Gunner's mate, a US Navy rating
General Mills, American food manufacturing company
GM Sugar Uganda Limited