Does GPUGRID output any screen saver graphics like Rosetta@home while it's running? I contribute 50% processing for GPUGRID and 50% for Rosetta@home. I only see Rosetta@home output graphics when my computer is in screen saver mode. I never see any GPUGRID output graphics. Please let me know how to enable this if possible.

There is no screen saver app for GPUGrid. You'll have to look elsewhere at other projects like Rosetta and Einstein that have those kind of apps.