I could play it with some friends. So far ok, only the first few days was trouble. I did find out that unifi does not work well with rockstar, some IP doesn't allow you to access their server. I had to reconnect my internet a couple of times to get the IP.
If you can load https://socialclub.rockstargames.com/, means you are able to connect to their server.
Grand Theft Auto V Online, discussions on single-player & online