I believe I answered this. If you have your quintum units registered to a gatekeeper then static routes will not work. You would need to create the route in your gatekeeper.
The reason for this is that you have told the quintum to use a gatekeeper for all routing. Once configured this way, the quintum will only accept routing information from the gatekeeper.
Without knowing your application, I cannot tell if you really need the gatekeeper or not, but if you can get away from the gatekeeper, then you can configure static routes in the sr area of the dx.