my best educated guess would be that you could play at 1024 x 768 with 20-25 fps on medium settings, perhaps a little higher. It's similar to the INtel GMA 950 in performance, but hopefully without the bugs that happen when you get to Wehan Terraces or EoTN...
I would say that yes, it should be able to play GW at low settings. Set the game to play at whatever the native resolution of the laptop's display is, btw - which is not necessarily 1024x768.