So Rockstar released a patch a couple of days ago to patch the framerate issues on the PC version of GTA V. That's some good news for a lot of players that were affected by this issue.
I had some problems with FPS but they weren't really too bad. I'm glad Rockstar fixed the problem in the end. I really like when a company cares about their playerbase and does everything they can to make the game as enjoyable as possible.