Rockstar Games Launcher was shut down soon after the release of Grand Theft Auto: The Trilogy — The Definitive Edition. Developers didn't provide any specific reason or timetable. Since yesterday players on PC can't launch GTA Online or Red Dead Online. And what's even better the newly released remasters aren't available too. The PC version of GTA: The Trilogy was even removed from the official digital store.
Rockstar Games provided a quick update on the status today, but it's completely vague. Developers are asking for patience while they are working on restoring services. It seems servers were overwhelmed with new users.