EDIT: I've actually reviewed the bans more in-depth. And I have to say, they would of banned ReShade users as well in that ban wave.
To be safe I would recommend holding off until the big rage-storm blows over on reddit and Steam forums/reviews. Which at that point Rockstar will most likely say exactly what is allowed and what isn't.
Then again those mods were accessing game memory and that's a huge no-no. CSGO hacks do that so it's very easy to see how it's not allowed.
ReShade on the other hand is a entirely different thing and they probably don't care but of course it's up in the air if they do or not until they say so.