G4, G.IV, G04, G.4 or G-4 may refer to:

• G4 (band), A British vocal troupe
• G4 bloc, a bloc of leading developing economies consisting of China, India, Brazil and South Africa
• G4 nations, a formal group of second-tier military and industrial powers: Brazil, Germany, India, and Japan
• G4 (TV channel), a TV channel
• G4techTV Canada, a Canadian television channel devoted to technology related programming
• G-4 Super Galeb, a tandem-seat low-wing advanced jet trainer/light attack jet of Yugoslav/Serbian origin.
• AEG G.IV, a German World War I heavy bomber
• ATC code G04, a section of the Anatomical Therapeutic Chemical Classification System
• Caudron G.4, a 1915 French biplane
• Santa Clara County Route G4, a county highway in Santa Clara County, California, USA
• Friedrichshafen G.IV, a 1918 German medium bomber
• Gotha G.IV, a 1916 German heavy bomber
• Project G4, the Kamen Rider Agito film
  • Kamen Rider G4, the movie exclusive character
• Power Mac G4, a series of personal computers made by Apple
• PowerPC G4, a type of microprocessor by Freescale used by Apple
• USS G-4 (SS-26), a 1914 G-class submarine of the United States Navy

and also :

• Allegiant Air (IATA airline designator "G4")
• Assistant Chief-of-Staff, Logistics (military shorthand)
• Group 4 of the periodic table
• Gulfstream G400 and G450, private jets
• a South African 155 mm field gun from the 1970s

See also

• 4G (disambiguation)

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