This would be a utility slot, so instead of FFS or GSD, have a ramp which only exists when the sundy is deployed and is aimed up and down by panning the camera from the driver's seat. This could open up deployment options to have sundies get players to a second level of a building easily or scale the exterior wall of an Amp Station.
I mean, yes. I even have used the colossus this way in the past. However I can't exactly do this every day without depleting the armoury can I?