I have often experienced that a multiple has parts that are gay. As a matter of fact, I don’t think there are many people who are either 100% heterosexual or 100% gay. Most people can be located somewhere on a continuum between <gay and straight>.
I can imagine that it feels more absolute and set in concrete for a multiple, because you don’t have instant access to the feelings of all your other parts.
Everyone – multiple or not – has to manage their feelings and attractions. If you or a part of you is attracted to a person of the same sex, what are the consequences of acting on that attraction? If you think it’s alright, you might have a wonderful relationship ahead of you. Managing these attractions, processing with your whole system what it means to have a same sex partner, and getting the support from people around you, is something that can be discussed and practiced in therapy.