"This is not a mistake, the takedowns came from Nintendo"
Nintendo issues takedowns against 20 years of Garry's Mod content, devs ask for your help "by deleting your Nintendo-related uploads and never uploading them again"
Goddamn lmao nobody's safe from those litigious fuckers
without wanting to sound like a nintendo apologist here (steal their games as much as you can, i certainly do): i don't really give a shit. not everything needs to be turned into popcultural slurry all the time. that's how you get fortnite.
just make something original if you want to make something, it's not that fucking hard
A game built around giving players absolute power to mod anything they want is going to by definition contain a pop cultural slurry.
Fortnite isn't even close to Gmod. Gmod's assets are built and maintained by the community, not a fucking multi-national corporation trying to such as much money from children as possible.
I don't know how G-Mod works, but is there like some central repository of maps and characters, or can anyone just download these from wherever and add them to the game?
The Steam Workshop is the easiest way to do it and that's the site they targeted - but it's not the only one, Nexus has a GMod page, so does gamebanana, gmodstore, mod db... it would be a lot of work to keep all Nintendo IP off of every single mod platform.
Gamebanana in particular stands out because they still host a lot of mods for Switch games, so they're thumbing their nose at Nintendo already.