When GP scanned the above it said it was deselected because it wouldn’t open. I don’t know if it is an authorization problem from Steinburg, although it is a working standalone program now… Most likely it is 32bit. In that case would a J bridge work?
You should get it from Steinberg and the installation program does all for you.
After Installation you have to scan the new plugin in the Plugin manager window.
And after that restart Gig Performer.