In that R&T article,
That car would have been a big departure from the 2004 to 2006 GTO. It has an extremely long hood and short rear deck, with an almost fastback roofline and a wide greenhouse with a tall beltline. The wheel arches were very pronounced, and the chin and rocker panel splitters gave it a race-ready look. Would it have been enough to make the GTO work in the US? We think it might of, but it looks like we'll never know.
Take a peek at the full gallery of the Coupe 60 Concept for a rough idea of what a newer GTO might have looked like.
UPDATE: An earlier version of this story incorrectly said that the R&T source article was no longer available online. A link to the article has been added.