Teichji :
Yeah, I Want Game to use GPU More than CPU (wich is impossible) but i mean settings in GTAV that would use more GPU and less CPU.
Render distance settings are absolute killers in GTAV, i have 70 days played, trust me haha. Go to Advanced Settings in the graphics and turn extended distance scaling to about 30%. Then in normal graphics options there should be another render distance option that you can turn down. That is what i had to do to fix performance issues anyway.
EDIT: If you are ok with sacrificing some visual quality, turning all advanced graphics options can have an insane effect. (helpful of course)