The Gran Sport name has been used on several high-performance cars built by General Motors for its Buick brand since 1965. In the GM brands hierarchy, Buick was surpassed in luxury and comfort appointments only by Cadillac, which did not produce performance models. As a result, the Buick GS series were the most opulently equipped GM sport models of their era.

The Gran Sport performance enhancements on all Buick products during this era sought to affirm Buick's tradition of producing powerful and comfortable products going back to the 1930s when all Buicks of the time were upgraded to the Buick Fireball Straight Eight, then installed the 278 cu in (4.6 L) Roadmaster engine in the shortest model Special and introduced the Century, known as "the banker's hot rod" with a three speed syncromesh manual transmission. The Gran Sport sought to identify cars that were fun to drive with a luxury approach.