I call them docks, so When I say dock, you know what I mean.
No, you can't control Docks. It would be cool if you could though. In World Airports 2 you can to some airports, and the airports that don't have docks, will then have those drivable staircases drive up to you. This is at manchester and Luton, but not ol' heathrow, charles-de-gaulle, and finally, schipol. Here is a list of the Airports they do:
Luton
JFK
Toronto
Frankfurt
Chicago O' Hare
Washington Dulles
Houston Intercontinental
Las Vegas
Dallas fort Worth
Rome
Manchester
Milan
All with docks, Drive me cars, Marshallers and sky chefs.