When you say Gateron, do you just mean Cherry clones? I hear Gateron manufactures Zeal's switches, some of which are finally deviating from the MX design with their new Clickiez Switches. (MX compatible in terms of boards and caps, Alps tactile/click leaves). They may have some other oddball stuff with other partners, but I can't think of any offhand.
Kaihua (Kailh) has their box switches, which are also MX compatible but with a slightly revised MX tactile mechanism and a totally novel clickbar mechanism for their clicky switches. Box thick clicks are the best thing that's happened for clickies since the 1980s, unless you count simplified Alps clones from Matias, resurrected dead switches, etc.
There are plenty of fancy new wizbang electrocapacitive, optical and even hall effect switches (I'm very interested in Silo Beam switches). By their nature, they're incompatible with existing MX boards and often deviate from MX mechanisms. Some of these are analogue and allow for customization of the actuation point and even different outputs based on how far the switch is depressed (analogue movement within video games, multiple hotkeys assigned to a single switch without the need for layering, etc).
There are more MX clones than I care to know about, since MX clones are just doing Cherry's work better or worse. They're all essentially the same at the end of the day. Which brings us back to your initial reference to Gateron. Most mainstream switches made by mass market manufacturers like Gateron, Gaote (Outemu) and Kaihua (Kailh) are just clones of MX ... so they're not so much MX compatibles as they are straight up copies, maybe with slight variation.
As far as wikis go, there's the good old
Deskthority wiki and at least the
MechanicalKeyboards wiki on reddit. Most users on Deskthority don't care much for modern switches unless they're actually something novel and there are rumors that the creator and maintainer of the MechanicalKeyboards wiki is deceased.
Switches.mx was created to try to catalogue the characteristics/specs of as many switches as possible, mostly modern I believe. I forget who it was who posted on this forum that they were creating it, but their attention to detail is outstanding. It is not so much a wiki though as it is a database.
That's a start, I'm sure I'm missing something, and could have expanded on many things I mentioned. I have been off and on here with work being insane myself, so there may be things I'm unaware of that are actually innovative
AND MX compatible.