Wouldn't a "gun license" also include an FID? The majority of those 378,642 are probably fudds who could not care less about the RKBA and figure government knows best when it comes to firearms.
Nope. Only 9% are FID. From Comm2A's numbers:
LTC-A NR LTC-A R LTC-B NR LTC-B R FID TOTAL
321,739 26,458 2,408 498 34,796 385,899
http://comm2a.org/resources/licensing-town-by-town-2015