A nice little Italian restaurant right next to the market square in Gliwice. They have the option of gluten-free cake, despite the lack of a certificate and the risk of cross-contamination, I ate it 3 times as a person with celiac disease, and everything was always fine! The kitchen takes great care of cleanliness so that the risk of contamination is minimal.
The taste is absolutely ok, it may not be any top Polish product, but it's really decent. I recommend it!