I would not because as far as I know, I am not gay.
My friend did, twice actually. Once because the guy came out during their relationship, and another time, the guy was formerly gay, but was now dating women. Neither ended well. I don't see the point personally in dating someone who is gay if you aren't gay yourself because it just won't work out b/c inherently they don't like you in that way.
If I date someone that is gay, wouldn't that mean I'm gay, since they are gay for me and I am dating the said gay person of the same gender?