GT4

GT4 or GT-Four may refer to:

Automotive

 * GT4 European Series, a sports car championship
 * SRO GT4 a sports car racing category
 * Ferrari GT4
 * Porsche Cayman GT4
 * Porsche 981 Cayman GT4
 * Porsche 718 Cayman GT4
 * Toyota Celica GT-Four

Other uses

 * Gran Turismo 4, a racing video game
 * GT4 (tram), a design of articulated tram which has two bogies and two body sections, and specifically:
 * GT4 (Bremen), a model of GT4 tram used in the German city of Bremen
 * Maschinenfabrik Esslingen GT4, a model of GT4 tram used in Stuttgart and other German cities