You don't need to be particularly clever to safely use a firearm, they're not complicated things. Also, IQ tests measure a very limited range of skills, if any. They mostly measure how good you are at doing IQ tests. More importantly, if you could measure intelligence and could then have regulations that differ according to an innate quality that just depends on accidents of birth, you'd be demolishing the fundamental assumption that we are all equal before the law and born with equal rights.
So that's no.