So im running GTA 4 on my laptop (ASUS x550ze AMD A-10) and the game uses the integrated GPU (512mb vram) instead of the Radeon R5 M230 that has 2gb of vram... Any possible way to make the game run on the gpu instead of the integrated graphics?
Have you read the section called "Assigning Switchable Graphics Mode to an Application''?
(The red text will take you to the proper part if you click on it.)
After setting "High Performance" mode to the game, you restarted it? Look into it more.