I've recently visited this Tim's location. I got lucky as the place wasn't overly busy so had a moment to speak to staff about GF items and how they're being made
Based on Tim's app the hash browns are GF. I was advised they get them delivered frozen and then they bake them on their own in the oven to order.
The staff had no problem accommodating my questions and changing gloves and ensuring nothing else was handled while my hash browns were being made.
It was nice to see and good to know I now can have a quick snack if on the road.
I got an iced mocha, no reaction! Tim Horton's has a marked allergen menu online where you can search by item, but I didn't eat any food so I can't attest to the accuracy of their claims. Some of their soups don't contain gluten, but their oatmeal has gluten as an allergen.
Has mostly drinks available.
I tried the hearty potato soup, the creamy sundried tomato soup and hash browns on a couple different trips over a month or so. All delicious and without any reactions.
Gluten-free Coconut Macoroons!!! Individually packaged. Yum