how to use "x360ce" for GTA 5: - download 64bit version of x360ce:
http://www.x360ce.com/ - extract the "x360ce_x64.exe" to the mainfolder of GTA 5 - run "x360ce_x64.exe" there as ADMIN! - create the "xinput1_3.dll" it asks for - "search automatically for settings" click next, and finish with the setting it found - click on the "Advanced"-tab, - check "Force Feedback Pass Through" to keep rumble effects(leave "Pass Through" unchecked) - click on "Left Thumb" - for X-Axis set "Anti-Dead Zone" to 22%(my exact value is 7209

), and "Sensitivity - Make less.." to 50% - for Y-Axis "Anti-Dead Zone" to 21%(my exact value is 7038), and "Sensitivity - Make less.." to 50% aswell - click on "Game Settings", "+Add" and choose the "GTA5.exe" - on the right field, check "64-bit v1.3" and click on "Apply/Synchronize Settings" - DONE, you can close the x360ce program, and start GTA 5 like you usually do, and should hear a windows standard sound at the start, to confirm that the "x360ce" settings are in use