Nah, that can't be a gunship- it's too Tiny!
A gunship should be around 200/250 Meters long, packed with power plants and Beam arrays, it's only purpose to move as fast as possible and give a knock out punch to larger Cruisers, corvettes, and yes, even destroyers. Absolutely minimum crew and almost no other weapon systems ensures power for such a purpose.
Weapons compliment would be 4 Anti-Cap beams, 2 turrets on the forward nose and one turret to each side, LRBGreen beams to be precise. It would also include 2 AAA Beams (the smaller variety). This is meant to deal with the larger slower capital ships, at the edge of the beam range - this range is 8K while the Shivan's maximum range appears to be 7.5k- and to stay at that range. The lack of systems and the somewhat small size/crew would make it economical to produce and somewhat effective against...anything when used in large enough numbers.