I could find no such prohibition for a DUI.  The closet I found was a section of the law that lists several factors which preclude issuance of a license including, but not limited to, being a habitual drunkard or abuser of controlled substances.  I also found a section which states that persons convicted of drunk driving three times within a five-year period may possess but may not purchase a firearm.  Looks like you should be able to get licensed.To be sure you could check with an attorney that practices in PA.