GT used to stand for ¿Gran Turisme¿, high performance racing cars for long-distance races. Today, FIA passes regulations for several GT classes. Car makers offer GT models as ¿the icing on the cake¿ of their model ranges, too. Mercedes even names a model GT and tops it all off with the GT S. Porsche knows to excite with a GTS as well, while J-Sport turns the Subaru GT 86 into a power machine.