A: Yes it is possible to automate an existing garage door, any retractable garage door can be automated simply by adding an operator such as the Hormann Promatic, or Supramatic if you have a bigger/heavier door.
Canopy garage doors aren’t fitted with a mechanism built to work with operators, however, Hormann have manufactured a new device called the “canopy operator” which is a connection arm that enables the door to be automated.