G3

G3, G03, G.III, G.3 or G-3 may be:

Politics

G-3, the three largest countries in the European Union
G-3 (Latin America), grouping of Colombia, Mexico and Venezuela
G-3, potential grouping of the world's three superpowers: United States, China, European Union or three largest economies United States, European Union, Japan

G3 battlecruiser, a post First World War design for the Royal Navy that was curtailed by the Washington Naval Treaty
AEG G.III, a German World War I heavy bomber
Albatros G.III, a 1916 German bomber aircraft
Caudron G.3, a 1913 French single-engined biplane
Friedrichshafen G.III, a 1915 German medium bomber
Gotha G.III, a 1916 German heavy bomber
Heckler & Koch G3, a rifle produced by Heckler & Koch
Assistant Chief-of-Staff, Operations and Plans (military shorthand)

ACPI G3 power state in computing
iAudio G3, an mp3 player from Cowon
Canon PowerShot G3, a digital camera made by Canon Inc.
Gibson G3, a 1975 bass guitar
PowerPC G3, a microprocessor branding used by Apple Computer
G3 Content Management System a framework for sophisticated websites and e-commerce solutions
G3 may refer to Godzilla: Unleashed being the third game in the series
G3 fax encoding format
Avaya Definity G3, a PBX

G3 (tour), a live music show and guitar tour organized by Joe Satriani and Steve Vai; featuring guitarists like John Petrucci, Eric Johnson, Yngwie Malmsteen, Paul Gilbert and bassist Billy Sheehan, among many others
G3 Magazine, a UK magazine for lesbian and bisexual women

G3 star, a subclass of G-class stars
ATC code G03, section of the Anatomical Therapeutic Chemical Classification System