A Gerber file contains a “flattened” version of your PCB layout for manufacturing purposes. While the geometry should be identical, all of the design intent is completely lost. From a Gerber, it’s no longer really possible to determine the difference between a trace, a pour, or a pad.
Worse, Gerbers also don’t contain any pertinent information about parts or footprints; all they contain are layer outlines and drill holes. So while it’s theoretically possible for us to implement a “Gerber import” process, it wouldn’t be very helpful to anyone trying to do engineering.