The Pontiac GTO is an automobile that was manufactured by American automobile manufacturer Pontiac for the 1964 to 1972* model years. Although there were muscle cars introduced earlier than the GTO, the Pontiac GTO is considered by some to have started the trend with all four domestic automakers offering a variety of competing models. *Note: in 1972 the GTO reverted from a separate model to an option package for the LeMans and LeMans Sport coupes. The GTO model was revived from 2004 to 2006 model years as a captive import for Pontiac.