G6 or G-6 may refer to:
Group of Six, a group of industrialized nations (France, Germany, United States, Japan, United Kingdom, Italy); later became the G7, then the G8
G6 (EU), A similar grouping, but of the six largest
European Union members.G6 engine, a
Mazda piston engineG6 howitzer, a
South African self-propelled howitzerG6, or the G above
Soprano C, the third note in the
whistle registerG6 star, a subclass of G-
class starsGroup 6 of the
periodic tableGuine Bissau Airlines, IATA airline designatorNATO code for the Assistant Chief-of-Staff, Information Technology
Pontiac G6, an
automobilePowerShot G6, a digital camera manufactured by
CanonG6 Flash, a brand of flash memory card for the Nintendo DS.
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