Yes, it's just a CD/DVD emulator tool. Thing I don't like about gamedrive is they don't let you update with updates that were provided under your original subscription time.
I haven't looked at Daemon Tools (you got a link for it?).
You using Daemon right now?
Software I had working with gamedrive...
-Battlefield Vietnam
-Battlefield 1942
-Counterstrike
-UT2004
-Never Winter Nights
-Reason