The gpu in that laptop is not upgradeable; laptops rarely work this way, and even if they do, the upgrade is usually not worth it since you didnt buy the higher end one to begin with. (wasted money on the current gpu being a lower end one than what was available). Not dissing your choice in computer at all my friend, but just trying to explain how laptop gpu upgrade work.
All you need to know is that this one does not have an upgradable gpu
current good gaming cards that can be had in laptops under $1000 are the gtx 760m and 765m. I personally do not know much about the amd side of laptops.