So, not sure if this has ever happened to anyone else. But, my game froze after the NVIDIA screen as well. My task manager kept showing that GTA was opening an installer to install something.. weird, I know. Turns out it was "Nikon Movie Editor". So, I tried completely deleting the program with "revouninstaller". Deleted all of its files and registry items from my PC, so when GTA had nothing to open, the game worked fine. Spent a few hours trying to find out why my game wouldn't start, and I have no idea how this even made sense but it worked.