To say it straight away, we have never had a bad meal in Gosau. It's just typical Austrian cuisine. We don't know all the restaurants yet, as we also like to cook for ourselves. We most often go to the "Kirchenwirt". Schnitzel, cordon blue, salad with (or without) chicken, etc., etc. . Everything tasty at good prices. Or to Sabine's in the "Echo". Similar, but a little further. But with an extensive menu for vegetarians too. Experience has shown that children and teenagers like the "Siena". Typical (Austrian) pizzeria, right next to (in) the Gosau indoor pool. The "Hotel und Gasthof Koller" offers slightly more upmarket cuisine in a "time-honoured ambience".  However, you should book there at least one day in advance, as they primarily cook for hotel guests. Very good wine list! We have not been to the "Gosauer Hof" and the "Gasthof Gosausee" as often. But we only hear good things about this restaurant too.