What board are you using for the Profibus?? Anybus board (SARCR-XFB01) ?
Couple of options:
1. Brand new controller, very few out there, especially with Profibus. Go to the manufacturer. The chances of someone having the GSD file are slim to none, except Motoman. You can sit around watching the board, waiting for an answer or pick up the phone or email Motoman and get the correct file sooner.
2. Depending on the board it may use the hms_1003.gsd file. The latest version of this file can be downloaded at
http://hms.se or contact HMS.