Except in some local jurisdictions, people rather than guns are licensed in the US, so the term 'gun license' is generally meaningless. Long guns (rifles and shotguns) and handguns not carried concealed are usually not subject to any government controls, although a license (issued by an entity such as the Dept. of Fish and Game) is usually required to hunt and there are safety rules some places. "Access to a gun' probably means the .22 bolt-action in the closet much more often than it means the 9mm pistol in the drawer next to the bed. It is important to remember that, under our governmental system, this is one of the things left to the states to regulate, so there is no national gun policy.

Most people (like me) own no guns, but some own several and a small minority own a large number. A very small number, although I guess that I should say a small percentage of our very large population, carry a handgun regularly, either for personal protection or to prove a point. IMHO, the former are more dangerous than whatever they are protecting themselves from and the latter are jerks, but that's only my opinion.