As far as I know there is no 2 different words for gender and sex in German, so sorry the confusion. I meant sex, not gender.
Cata, a neutral bathroom is the most tolerant way. Don't forget about people who are intersex.
It might be the most tolernt way, but not the best way. I doubt all women are comfortable with sharing the same bathroom with men.
Edited 7/22/2017 18:06:47