doesnt really matter for 2D work as long as the GPU supports the res of the screen, even the intel onboard gpu should support 2560x1440.
if youre looking for GPU acceleration (very limit in adobe apps) or 3D/video work (gaming, or HD video work) then thats another matter.
the onboard GPU will use a small amount of the system RAM however (wouldn't expect more than 1-2Gb to be allocated), if that bothers you then a fairly inexpensive GPU card will free that back up.