Some people like boys, and some people like girls, and some people like both. That's called being gay, and it's okay because everyone should be allowed to love who they want.
Bishops are important leaders in some churches. They help people and lead religious services. Sometimes, people who are gay become bishops too. Some churches are okay with this, and some churches are not.
But just because someone is gay doesn't mean they can't be a good bishop. It doesn't change how good they are at helping people or leading services. So, some people believe that gay bishops should be allowed, and others don't. But everyone should be treated with love and respect no matter who they love.