I do live in Gwinnett. By "NE metro", I mean the quadrant east of Ga. 400 (maybe as far west as I-575) and north of I-20, and outside I-285. Along I-20 east towards Covington, WDUN comes in better than WGST which is unlistenable by that point. YMMV.
Downtown, WDUN is listenable during the day on a car radio or other decent set (not a $5 Radio Shack Flavoradio), but a scan may or may not stop on it, and you certainly have a lot of other clearer AM options that you don't have in the suburbs. WDUN won't "pop" the way a lot of other AMs would in town....but their processing isn't quite so "loud" as some other AMs, either. IMO it gives up a little DX listenability for better close-in listenability.