NO,
unless by gaming you mean 2D games, very very simple 3D games or 2~3 year old 3D games. It will NOT run any new 3D first person shooters or simulation type games.

Intel GMA X3100 is the WORST card you can buy these days in a Core 2 Duo based notebook. For games the MOST IMPORTANT thing is the graphics card. CPU, RAM or another component can’t make up for a crappy graphics card like the GMA 3100.

Also noticed that its a MAC, this is the absolute worst combo you can pick for games (MAC with a X3100).

p.s : YOU CANNOT UPGRADE THE GRAPHICS CARD !! Just to clarify some misleading recommendations given above by *Atlanta* and *Dee*