The only things that matter are conduct and ability. I don't give a damn if the teacher is an eight foot tall purple bulldog, can they teach, and can I trust them with my child?
Considering I had plenty of straight teachers who had no business teaching, either for one reason or another, I honestly don't see how sexual orientation factors in. I literally had one World Geography teacher tell us A) Greece is in Rome, B) the symbol for the Islamic faith is the Star of David. There were more jewels of wisdom but those really stuck with me over the years.
*facepalm*