Graphic design represents the visual aspect of a design. If you break down a design, there are two pieces: the thought behind the layout, and the style (colors, typography, etc.) used to convey the thought.
Graphic design is a part of every designers capabilities, though clearly there are vast differences in artistic ability between designers. I tend to appreciate designing interfaces, though I love printed layouts as well. I just relate more closely to the interactive nature of an interface, specifically on the web.
If you've got a need for an interface, logo, brochure, mailer, flyer, business card, t-shirt, etc. - contact me.