This is my RHAG, or Republic Heavy Assault Gunship (I wonder if you can spot a pattern in the naming of things I make...)
Basically, it's a beefier version of the basic Republic Gunship - longer, wider, taller, wider wingspan, heavier and more plentiful weaponry and more internal space.
In terms of weaponry, this has the usual rocket launchers on the wings (but bigger with more explosive rockets), forward/rear mounted lasers and bubble pods on both wings and main body. This one however has (although you can't see it) a series of heavy laser cannons on the underside of the wings (I think it was three each...); the round sections in front of the body bubble pods each house a plentiful supply of various kinds of other projectiles which if I remember correctly were proton torpedoes in red, concussion missiles in blue and EMP rockets in green. They also fold outwards to reveal two ion cannons, one on each side. The grey plates in the middle of the wings just beneath the rocket pods also fold up to reveal mini chaincannons.