G4 or G.IV may refer to:
Places County Route G4 (California), a county highway in Santa Clara County, California, USA G4 Beijing–Hong Kong and Macau Expressway, an expressway in China G4 (Taichung Metro), also known as Songzhu Station or Jiushe Station, a station under construction in the Taichung Metro
Arts, entertainment, games, media G4 (American TV network), a former American television channel G4 (Canadian TV channel), a former Canadian television channel G4 (group), a British vocal troupe Grob's attack, an opening move in chess
Groups, organisations, companies G4 nations, four nations that support each other's bids to become permanent members of the United Nations Security Council: Brazil, Germany, India, and Japan Big Four (Western Europe), sometimes called 'G4', a group of powerful countries in Europe VIP Protection Unit (Hong Kong), a unit of the Hong Kong Police Force (originally Section G, Division 4) Allegiant Air, by IATA airline designator G4 Racing, a Swiss auto racing team
Electrics, electronics, and computing G4, a type of bi-pin lamp base (socket), a lamp fitting where the pin spacing is 4mm LG G4 smartphone Moto G4, a line of smartphones Group 4 compression, a type of image compression used in fax machines and some image file formats
Apple Computer PowerPC G4, a type of microprocessor by Freescale used by Apple Power Mac G4, a series of personal computers made by Apple Inc in July 1999 PowerBook G4, a series of Professional notebooks made by Apple Inc in 2001 iMac G4, a series of personal computer made by Apple Inc in January 2002 Xserve G4, an Xserve server made by Apple Inc in May 2002 iBook G4, an iBook series of consumer notebooks in October 2003 Mac Mini G4, a Mac Mini series of ultracompact computer in January 2005
Science and medicine G-4 (drug) (Ganesha-4), a psychedelic-related chemical compound
Vehicles AEG G.IV, a German World War I heavy bomber Caudron G.4, a 1915 French biplane Friedrichshafen G.IV, a 1918 German medium bomber Gotha G.IV, a 1916 German heavy bomber Gulfstream IV, a family of private jet aircraft Mahindra Alturas G4, an Indian mid-size SUV Mitsubishi G4M "Betty", a World War II Japanese fast bomber Mitsubishi Mirage G4, a Japanese subcompact sedan Soko G-4 Super Galeb, a jet trainer/light attack jet of Yugoslav origin USS G4 (SS-26), a 1914 G-class submarine of the United States Navy G4-class freighter, a cargo ship design LNER Class G4, a class of British steam locomotives Pontiac G4, a compact car sold in Mexico
Other uses G4 EA H1N1, a strain of influenza G-quadruplex, a DNA secondary structure Group 4 element, a class of elements on the Periodic Table ATC code G04 Urologicals, a subgroup of the Anatomical Therapeutic Chemical Classification System Galactic 04 (G04), a Virgin Galactic suborbital tourist spaceflight in October 2023, the first spaceflight of a Pakistani
See also
Group 4 (disambiguation) G4S, formerly Group 4 Securicor 4G (disambiguation) Gang of Four (disambiguation) Kamen Rider Agito: Project G4, the Kamen Rider Agito film Kamen Rider G4, the movie exclusive character Giv (disambiguation)