The Gunboat and Y-Wing do have the exact same armament. I always considered them "Imperial Y-Wings".
Those were a real bitch to fight in TIE Fighter and X-Wing. (they have a turbo laser on their arse - thats pie to you Americans.)
I remember my officer harping on about how I had to first fire a missile at their turbo laser to disable it, and then fire two more at the shuttle itself, destroying it.
Good times.
And yes, I'd love to have it in First Strike. I'd freaking live in it.
Oh, and I wonder if they can fold their wings like Lambda class shuttles can. Otherwise, I don't see how you can land them. Maybe they simply use the wings as landing struts?
"One of the bitches actually gave birth while she was attacking, and her puppies joined in on the carnage."
--the awesomeness that is Boatmurdered.