The problem with this is that there are 50 states (57 if you ask Obama
)
That is a lot of subforums to deal with and moderate.
Second, all that information you speak of that is requested is but a few clicks away on their respective states government site or multitudes of other gun-rights websites.
Even if the information was posted in such a subforum, not many would bother to search or even check it before they asked their question anyway.
What would make more sense and would be easier is to have a moderator make a "sticky" thread labeled "Gun Laws by State" and list each states gun laws site as a link to be clicked on by the requester.