My usual Toronto gulling areas are Ashbridges and Bluffers. The only places I know of in ashbridges are the body of water that is closest to lakeshore blvd (I had Thayers there a couple weeks ago), and the boat launch ramps (where I get Glaucous and GBBG). Bluffers is an amazing place to check when the water is frozen (at the base of brimley rd). As far as I know, the Thayers that I found at ashbridges has been seen everyday since at Bluffers. I've had double digit Kumliens at both locations so they're both really good. You just have to go on the right days.