Hello,
well, we now have PPro 2010 beta, which includes indirect lighting AND GC.
This is a great plus! (And the beta runs more stable for me than the initial P8 release).

The only thing I need now is a script which sets the gamma value of displacement
and bump maps to 1.0, or the results with GC turned on might look weird.
(Try DAZ / RHS "Atonement" for example, the floor looks very weird with GC on.)
In cases where the same map is used for bump and color, an additional
node will be required.

If someone has such a script, please post. Otherwise I have to attempt such a thing
over the next days.

Best regards,
   Michael