Client Log
What is it?
The client log is a simple text file containing all output to the client console for a single game session. A new log is created every time the game starts.
Where do I find it?
Open GTAC launcher. Click "Tools" at the bottom right, then choose "Logs". A folder window will appear. Go into the folder named "Game".
If you just had a problem in-game, you'll probably need the newest log file. Sorting by the "date modified" column will make it easier to find this one.