Yeah, that would be fun. I can get you on to Knockhill most days, however the "private" open pit sessions are the best.
Once you get the confidence with the GTR it is very easy to move the torque split from rear to front, or where ever you want it, and once you get the power down the car feels extremely light and agile, until you need to stop. and then you realise that it is a very heavy car indeed, however once you sort out your braking zones, it becomes extremely rewarding and enjoyable.