Honestly the title of the thread should be how bad is the GMA G33, its honeslty the worst integrated graphics there is (besides older tech) but what are the rest of your system specs? and what do you intend to do with it, we can help
The GMA G33/G31 is not a graphics card, it is a graphics adapter built into old motherboards and good is not the word to describe it, especially if you are talking about gaming.