Whelp old thread but

When I did my research and bought my 06 GP GT I noticed the 04-05 GTPs were 2G2WR* and the non GTPs were 2G2WP* but in 06-07 the GT's were 2G2WR* Same as the GTPs.

Hope this helps - not sourcing anything this is from 5 year old memory. Main thing is 5th Digit R.