Well, there's always a sort of trigger for the Gauss gun to fire.
I think you might want to look at the information in the Cap ship files, as they have more than one weapon, as well.
Or possibly take the hangar part from the Cap ship files and then slap that onto the end of the Gauss gun files. The gauss gun would continue firing as normal, but would generate Strike craft like a cap ship would.
I don't think simply adding that part of the mesh and adding the gauss gun strings unedited would work. You'll have to tinker around with that. The capital ships would be the closest example of how it would work.