I'm gluten intolerant rather than coeliac, so am less concerned about cross contamination. As always it depends where you go. It's certainly a well known condition but, at the same time, typical German food is heavy on wheat. But there are limited menu options possible, and breakfasts are easy with their focus on meats, cheeses and yoghurts.

As a side note, LH lounges are very aware, with GF breads available.