On Gab daily. Never seen a single Nazi. Seen some unorthodox/thought-provoking views for sure, but that's part of why I visit and one of the same reasons I visit HN.
Andrew Anglin, operator of The Daily Stormer is famously one of the biggest 'influencers' to move to the original Gab platform, and he remains fairly active there. Gab's front page has been tuned over time to be less egregious, but I have been poking around the site for a long time and remember when even in logged out view the home page would be a lot of altright / TDS type of posts filled with general /pol/ tier takes.
And though the main feed / explore page is not quite as openly tilted toward that audience today, the 'groups' features not one but three QAnon groups, which appear to be some of the largest on the site.
In short - if you've been looking at Gab's content since their inception, it be hard not to see activity from some prominent altright/stormer users, and there remains a large quantity of both weird political extremism and general cultism promoted at the top level of the site.
So what? If you happen to see an obnoxious Nazi posting, simply mute them and move on with your life.
Personally, I usually don't even do that, because it's useful to occasionally comment on their posts (which are a tiny, tiny fraction of Gab's content) to point out to them that Nazi totalitarian tyranny is in no way preferable to socialist/Communist totalitarian tyranny.
I wonder if anyone here has ever even seen either site, because the vast majority of the comments here are simply regurgitating national media talking points about the sites - and those talking points bear zero relationship to reality.
America used to be about the free exchange of ideas.