G (disambiguation)

• G, a fictional character in the game Club Penguin
• G, a fictional character in Sega's The House of the Dead series
• G (Street Fighter), a fictional character in the Street Fighter series
• Mr G, or Mr Gregson, a fictional character in the Australian TV comedy Summer Heights High

• G (2002 film), by Christopher Scott Cherot
• G (2004 film), a documentary about methamphetamine use among the Navajo

• G (musical note)
• G major, a scale
• G major chord, Chord names and symbols (popular music)
• G minor, a scale

• G (Gerald Levert album)
• G (King Creosote album)
• G. (album), an album by Gotthard

• "G", a song by Avenged Sevenfold from the album Life Is but a Dream...
• A prefix used to denote the Gérard catalog, a catalogue of Luigi Boccherini's works compiled by Yves Gérard

G is a common type of content rating that applies to media entertainment, such as films, television shows and computer games, generally denoting "General Audience" meaning that access is not restricted. The following organizations all use the rating:

• Australian Classification Board
• Canadian motion picture rating system
• Eirin
• Irish Film Classification Office
• Media Development Authority
• Motion Picture Association of America film rating system
• Movie and Television Review and Classification Board
• National Bureau of Classification (NBC)
• Office of Film and Literature Classification (New Zealand)

The "G" rating is further documented at Motion picture content rating system and Television content rating system.

• G. (novel), by John Berger
• G (magazine)
• G, the production code for the 1964 Doctor Who serial The Sensorites
• "G" Is for Gumshoe, the seventh novel in Sue Grafton's Alphabet Mystery series, published in 1990
• The G logo for the Brazilian television network Gazeta in São Paulo since 2000

• G, a stellar classification for yellowish stars
• G, part of a provisional designation in astronomy for any comet, asteroid, or minor planet discovered between April 1 and 15

• g, an abbreviation for gaseous
• ATC code G, Genito-urinary system and sex hormones, a section of the Anatomical Therapeutic Chemical Classification System
• G protein, a family of proteins involved in transmitting signals across cell membranes
• G factor (psychometrics), a variable used in investigations of cognitive abilities and human intelligence
• G-spot, or Gräfenberg spot, an erogenous area of the vagina
• Gamma-Hydroxybutyric acid, a drug more commonly known as GHB
• G (or Gly), abbreviation for amino acid glycine
• Guanosine, a nucleoside
• Haplogroup G (mtDNA), a human mitochondrial haplogroup
• Haplogroup G (Y-DNA), a Y-chromosome haplogroup

• "G", a visual programming language for National Instruments' LabVIEW
• G, the customary prefix for Gibi, the binary multiple meaning 1024³ = 1073741824
• G-code, common name for computer numerical control (CNC) programming language

• ɢ, a symbol in IPA for voiced uvular plosive
• ɡ, a symbol in IPA for voiced velar stop

• Catalan's constant, which appears in combinatorics
• Graham's number, an extremely large number arising in Ramsey theory
• Meijer G-function ${\displaystyle G_{p,q}^{m,n}}$
• Metric tensor, a type of function defined on a manifold, and a generalization of the dot product

• G band (disambiguation)
• Gauss (unit), a unit of magnetic induction
• Electrical conductance, g, the ease with which an electric current passes through a material
• g-factor (physics), the magnetic moment of a particle

• Einstein tensor, G, in general relativity
• Gravitational constant, G, an empirical physical constant
• Graviton (G), a fundamental particle theorized to mediate the gravitational interaction
• Gravity of Earth, g, the local acceleration due to gravity
  • g-force, the acceleration of a body relative to free fall
  • Standard gravity (g₀ or g_n), the standardised acceleration due to gravity on Earth

• Gibbs free energy, a function of thermodynamics
• Gluon (g), a fundamental particle which mediates the strong interaction
• Shear modulus, in materials science, the ratio of shear stress to shear strain in a material

• G, giga-, an SI prefix meaning 10⁹ = 1,000,000,000
• g, gram, a unit of mass in the SI system
• General intelligence factor, or "g factor", in psychometrics
• G, Birmingham gauge, used to measure the diameter of hypodermic needles