The important thing to remember that the whole ‘gemtlemen” thing was proposed by ONE moderator on ONE website, or at the very least a small amount of them. I have yet to see the actual article, but the whole situation reminds me of an article written by a Hasbro PR executive a few years ago, announcing a new Care-Bears cartoon, and suggesting that Bronies jump on that show as well, and call themselves ‘bear-bros’, or something equally stupid. the fandom felt insulted, or at the very least rolled their eyes at the whole thing.
There is, to my knowledge, no wide-spread donning of this new ‘gemtlemen’ moniker by any bronies, and those who are seem to be doing so to poke fun at the whole situation, such as in this humorously exaggerated steam invite.
If it wasn’t for the overreaction on the SU fandoms part, the whole “gemtlemen/brogem” thing would have gone on unnoticed.