It is pretty much a Pontiac in name only, (the ubiquitous badge engineering) although apparently the front end styling is different to the Holden Monaro :-
Holden designers worked under direction from their counterparts in the US to inject some Pontiac "DNA" by grafting a bolder, pointier nose on the Monaro's body.
It should already be on sale in the States with a six speed manual :-
The Pontiac GTO will be sold with the Chevrolet-sourced 5.7-litre V8 engine and a four-speed auto or six-speed manual transmission.
Quotes are from
this (old) article.
Also see
this article for a styling comparison - I must say I prefer the Holden front-end to the Pontiac version!