Special workspace gesture animations

[poseidon-rises]

I would like it if I configured the following gesture:
gesture = 3, vertical, special, myWorkspace
That the special workspace animation moves it up or down depending on which direction I make the gesture in. For example, if I swipe down while the workspace is out of view, it slides in from the top, while if I swipe up while its in view, it slides upwards out of view, etc.