Welcome to the largest Gravis UltraSound Archive on the web!
Feel free to browse all the subdirectories in /GUS and grab what you need.
Here are the final revisions of common GUS files to get your card up and running:
Gravis UltraSound Classic/MAX/ACE (GF1 Series)
Gravis UltraSound Plug and Play (PnP) (Interwave Series)
Gravis UltraSound Extreme/Synergy ViperMax (GF1 and ESS1688 Series)