@cvp, I guess we can easily create a wrench action to do the oauth and create a gist, but each user would need to have their own account and a client ID and secret...
Also looked at Working Copy in the hopes that it could be used to create a gist, maybe via a Shortcut action, but looks like no gist support there.
Of course, as @ccc said, having a misc repo where you drop things for sharing is not more trouble any more, almost less.
This is not a Pythonista issue, really, but is sad that Pythonista users experience it as a degradation of Pythonista functionality.