yep, only aerodynamic controls. otherwise if we start considering also nose steering we have to consider also the friction coefficient of the nose wheel with the runway. But this is not easy to do because of the difficulty of assessing the friction coefficient of the runway. Just consider the same runway in wet or dry conditions. The airplane companies in order to certify their new airplanes would have to produce a huge amount of graphs ecc ecc in order to calculate the VMCG in function of the friction coefficient.
Realy too much work. So just let's keep it simple and consider one aerodynamic VMCG.