G6

G6, G.VI, G.6 or G-6 may refer to:

International politics

• The G6 (EU), the six largest European Union members
• The Group of Six, the original name for the G7 group of nations

Transportation

• Gulfstream G650, a business jet aircraft
• G6 howitzer, a South African self-propelled howitzer
• Caudron G.6, a 1916 French reconnaissance aircraft
• Ford G6, an automobile manufactured by the Ford Motor Company of Australia
• Mazda G6 engine, a piston engine made by Mazda
• Pontiac G6, a mid-size car that was produced under the Pontiac brand of American automaker General Motors
• G6 Beijing–Lhasa Expressway, a highway in China
• Vossloh G6, shunting locomotive
• Bf 109 G-6, Variant of a World War 2 German fighter aircraft

Other

• G6, the third note in the whistle register
• G6 star, a subclass of G-class stars
• Group 6 element of the periodic table
• G6, a square on a chessboard or a move of a pawn to that square in algebraic chess notation
• "Like a G6", a song by Far East Movement