# G2

G2, G02, G.II, G II, or G-2 may refer to:

## Fiction

* Transformers: Generation 2: Part of the Transformers franchise, lasting 1992-1995
* Transformers: Generation 2 (comics), by Marvel Comics
* G2, an android in the movie Inspector Gadget 2

## Science and mathematics

* G2, a stellar classification
* G$_2$ (mathematics), an exceptional Lie group
* G2, a soil erosion model
* G2 gas cloud, an astronomical object on a collision course with the super massive black hole at the center of the Milky Way
* G$_2$ phase, part of the cell cycle
* ATC code G02 Other gynecologicals, a subgroup of the Anatomical Therapeutic Chemical Classification System
* Ovoglobulin G2, a protein in egg white
* Haplogroup G2, a subclade of Haplogroup G (Y-DNA)
* g−2, the notation for the anomalous magnetic dipole moment in physics
** Muon g-2 experiment at Fermilab (E989)
* g$^{(2)}$, degree of second order coherence in quantum optics
* G2, an informal group of fossil bird eggs from the Gobi desert that were later named Gobioolithus major

## Computing

* Extreme-G 2, a 1998 Nintendo 64 game
* G2, a model of PowerPC
* Gnutella2, the P2P file sharing Network
* HTC Hero mobile phone, aka G2 Touch
* LG G2, an Android smartphone developed by LG Electronics
* T-Mobile G2, an Android smartphone made by HTC for T-Mobile USA
* Cook Codec or RealAudio G2, an audio compression method

## Commerce and industry

* G2 Crowd, a peer-to-peer review site
* Gatorade G2, a soft drink
* Canon PowerShot G2, a digital camera
* Contax G2, the second Contax G camera
* Panasonic Lumix DMC-G2, a digital camera
* Slacker G2, a portable audio device for the Slacker music service

## Transportation

* County Route G2 (California), also known as Lawrence Expressway
* G2 Beijing–Shanghai Expressway, China
* Glasspar G2, a sports car
* Grumman Gulfstream II, a business jet built
* Fiat G.2, a 1932 Italian transport aircraft
* Galactic 02 (G02), a suborbital tourist spaceflight on 10 August 2023 from Virgin Galactic
* G2, the Avirex Gabon IATA airline designator
* G2, a class of driver's license in Ontario, Canada
* Pontiac G2, a hatchback sold in Mexico

## Military

* AEG G.II, a German World War I bomber
* Albatros G.II, a 1916 German biplane bomber prototype
* Dirección de Inteligencia, Cuba, also referred to as "G2"
* Directorate of Military Intelligence (Ireland), commonly referred to as "G2"
* Friedrichshafen G.II, a 1916 German medium bomber aircraft
* G-2 (intelligence), the United States Army unit
* G2, a designation in NATO's Continental staff system, related to Military Intelligence
* Gotha G.II, a German bomber during World War I
* HMAS Nestor (G02), a 1940 Royal Australian Navy N-class destroyer
* Pindad G2, a handgun produced by Pindad
* Soko G-2, a 1961 Yugoslavian two-seat aircraft
* USS G-2 (SS-27), an American submarine

## Other uses

* G-2 or Group of Two, a proposed economic bloc and special relationship between the United States and China
* G-2 visa, a nonimmigrant visa which allows travel to the United States
* G2 Esports, a European eSports organization
* G2 (film), an upcoming Indian Telugu-language action spy film sequel to Goodachari
* G2 (rapper), the stage name of South Korean rapper Kevin Hwang
* G2, a block of character codes in the Teletext character set
* G2, The Guardian weekday supplement