The Guardian article is probably right in naming baphomet (on 8chan), but then follows it up with some very shady language to link it with KiA. I have visited baphomet a few times, and they seem to be doing their own thing, whatever that may be.
As far as I know, Reddit has very strict policies in place to discourage doxxing (except on r/doxme). KotakuInAction, the one you called gamergate's organizing site, cannot be involved in doxxing. Though I'm not a regular reader, I visit it every few weeks to see what they're up to. Not only have I not seen any doxxing there, I have seen threads discouraging such behavior. Also see their Rule #2: "This is the quickest way to a ban, not just from us, but the Reddit admins. Seriously, don’t do it. Take every effort to ensure that your posts do not include any personal information, especially in screenshots."
That said, you're linking to a post written by Mike Cernovitch, one of the more vociferous people in GamerGate, where he's making the popular argument that he's the real victim here.
Again, let's review the evidence: if you read more than the headline it's immediately obvious that there was no actual SWATing or even threat to do so and, more importantly, none of it was done by Zoe Quinn. The person who actually posted his address used the information which he'd listed on a business directory before removing it and apologizing:
https://medium.com/@ManfredVonKarma/mike-cernovich-based-law...
The key thing, of course, is that he wouldn't have been able to use a stranger’s actions to justify the anti-Zoe hate campaign. If you read it closely, notice how each claim in the article starts with something true but then adds unsupported insinuations that Zoe was masterminding it in an effort to shift the ire to her rather than the person who actually wrote the post.