Now - I don't have an open gunship, but I do have two Barc speeders. They have this rip-cord feature that allows you to simulate the Barc-trooper racing into battle. (whatever)
Anyway, needless to say, the Barc Speeder is longer, doesn't come apart and has a large wheel in the rear. Taking all of this into account, my guess would be that the BARC Speeder DOES NOT fit or lock into the Gunship as nicely as the Speeder Bike did.