Someone just pointed THIS SITE out on Usenet so thought it would be helpful for those planning on travelling. The restaurants listed serve other foods but they are able to do total gluten free (they have to adhere to strict regulations). It is recommended that you make a reservation and let them know beforehand. Just click on the region on the left hand side of the main page and then you can click where it says stampa l'elenco completo della Regione and print the list for the region.

Moving to Italy and Driving in Italy