I must admit to some bewilderment. Poly gay men (and perhaps equally bi men) seem to be just extremely rare.
Now, by "poly" I mean relationship oriented poly, not sex-centered poly. (Just to be clear, since some people these days use "poly" to refer to a wide range of kinds of "relationship," many of which are far more about sex than about loving connections and real (rounded) intimacy, bonding, etc.
I am always learning of gay and bi men who like to have sex partners they are not much connected with in any kind of whole relationship sense -- casual friends with benefits (sex buddies, really -- nothing more), say, where the "friend" part is a bit of an exaggeration, or "f**kbuddies," ... whether the person is in a committed relationship or not.
Overwhelmingly most gay and bi men seem (to me) to want full-on monogamy or at least "emotional monogamy" when partnered. When not partnered they seem to want either "just sex" (no relationship) or some variety or another of monogamy.... Where are the poly gay and bi guys?
The poly world seems to have a LOT of lesbian and bi women. Right? Where are the gay and bi men?
Sorry about my very rough language here. It must be a consequence of frustration.