So in Star Wars Rebels, which is the first canonical source showing the Gonzati being used as a carrier, the Gonzati carries Ties as with the model, but it also carries two walkers into battle. It drops them off and they immediately begin attacking Rebels on the ground. Could this be the first sign of a ground based system? That would be awesome!
(PS - this entire post is tongue in cheek and I realize that it is a highly illogical jump, but I can dream can't I?)