Not unless she invoked that part of her current SoE authority. Just because an SoE is declared doesn't mean that every aspect of that authority is enacted "de facto".
Believe me, if she had, you would have heard about it.
And just because she has the authority, doesn't mean she has the political capital to spend on such restrictions that would certainly loose her some serious brownie points with voters.
That is one deceleration she will think long and hard about before enacting, not to mention its not a power she should posses at all anyway. Gun owners are still very aware of the effects such decelerations had during Katrina, and the backlash on those who enforced them.