The word on the street (I so close to PG Music that I pick up my updates for PT) is that he was a medical doctor (physician). Someone once told me he was a PhD in music here at the University of Victoria, but a better source (my pianist/piano rebuilder friend) indicated that he was a physician. Since PhD's are often referred to as "docs" this may be the source of the confusion.
His brother the guitarist, lives on Pender Island, BC. With Google maps, you can find both quite easily.
http://www.olivergannon.com/A search of Peter Gannon yields plenty of hits for a dentist and a movie actor.
Glenn
PS - now I'm going into hiding.