Buick Gran Sport

The Gran Sport, or GS, was a muscle car marketed by Buick in the sixties and seventies. The GS name was revived as a trim for the Regal decades later. The name Gran Sport was also used for a version of the Chevrolet Corvette. The GS was Buick's entrant in the Grand National and Winston Cup in the sixties and seventies. A "GSX" version was introduced in 1970.