 The then recently discontinued GTO (as well as the Firebird/Trans Am before it), also utilized the rear-wheel drive layout.The GTO was another Holden product, known as the Monaro in Australia, repurposed and rebadged for U.S. consumption.Production was discontinued in 2006 due to new US safety regulations and the architecture being phased out worldwide in favor of the new Zeta platform on which the G8 is based.