What does gt stand for on muscle cars?

A grand tourer (Italian: Gran Turismo), (initialised GT), is a high-performance automobile designed for long-distance driving. Any such car could be considered a grand tourer, but the traditional and most common body style is the coupé (two door) with either a two-seat or a 2+2 seat arrangement. The term has lost most of it's real meaning and has been applied to cars that really do not qualify as a true GT. Just because it has GT after the name does not mean it is a true Grand Tourer or Gran Turismo car.