If one is attracted to a gay guy as a woman, I would say one is heterosexual, but confused. Sexually speaking, a female is attracted to a male here. Likewise, a guy attracted to lesbians is straight.
Why one would have surgery to have sex with a man (or vice versa), when it's already perfectly feasible under the current circumstances is beyond me. Just find a gay man (or lesbian) willing to have sex with you (bi, I suppose).
Now, another poser (just as silly): if a gay man is attracted to masculinity, and is feminine, and a lesbian is attracted to femininity, and is masculine, would they work as a couple?