In terms of cross-attractions, I haven't really come across any GLers, except maybe one, that was attracted to anything else other than women. I have however met BLers like you describe, and I can't say I understand this phenomenon.
I do think GLers are of course attracted to "cuteness" in LGs, but not among much else, except women, in some cases.
That being said I have actually met "fake" GLers/BLers, where they claimed they were a CLer, but weren't really attracted to kids per se - it was some other thing. And they were attracted to all sorts of categories like you describe.