For various reasons I've been studying policies on both community and arbitration sanctions and looking at lists of such sanctions here:
https://en.wikipedia.org/wiki/Wikipedia:General_sanctions#Active_sanctions

Of particular interest is the recent arbitration
https://en.wikipedia.org/wiki/Wikipedia:Arbitration/Requests/Case/Sexology

which here :
https://en.wikipedia.org/wiki/Wikipedia:Arbitration/Requests/Case/Sexology#Discretionary_sanctions
Specifies:
"Standard discretionary sanctions are authorized for all articles dealing with transgender issues and paraphilia classification (e.g., hebephilia)."

From past postings here we know that editors who obviously are or admit to being women have been insulted as women in very direct fashion; I'm sure it must still go on today. (Searching WP:ANI I see "sexism" has been brought up before and at least one openly sexist attack lead to a block; I'm sure more research would find a few more.)

Anyway, I don't see any current issues that would lead to either a request for community sanctions or for arbitration sanctions where admins could levy a sanction on sexist behavior without someone having to go through WP:ANI.  But it is something to keep in mind should there be a number of related issues at the same time.

Of course, if all the women who leave after the first time they get insulted as women ''knew'' that they could go to ANI and at least get the editor warned, and if they were supported by people who told them about the process and how it works, there might be a lot more women around.  At the very least it's something we can do as individuals if we see women editors attacked.

Of course, the problem is most of the behavior is more the subtle double standard type where those perceived as women may get 30-40% more grief than editors assumed to be men, or have their edits reverted more and their concerns more generally ignored; however,  the behaviors don't quite reach the level where they could support a complaint. 

I don't know if any of this is something that any of the Gender Gap projects would want to address in a more organized fashion.  But had it in mind. Thanks.

CM in DC