The laptop has a g2 socket and the cpu can be upgraded and it has a pcie card slot. Here is a youtube link https://www.youtube.com/watch?v=7HvnPnmERtI that shows the inside of my laptop. About 40 seconds in is when you will get the best image.
You'd need to find a discrete mobile GPU that can fit inside your laptop then. You'd also have to confirm that it's firmware is equipped to recognize a discrete card otherwise it might not work.