Not easily it is all part of the main logic board. The question is why? Card integrated was designed & developed for the board. If you have maxed out your RAM. You could put in a 2nd quicker hard drive. Installing MacBook Pro 13" Unibody Mid 2010 Dual Hard Drive
No computer lasts forever, however well you maintain it or look after it. My advice would be to put any spare cash put towards a newer machine.
To squeeze any extra performance out of the machine the best thing you can do it to use a de-installer to remove any software you don't use on a regular basis. (I use Cleanmymac, but there are others out there.)
Plus don't have millions of files on the desktop use actual aliases. (CMD-L)