I've always heard electronic speed management referred to as "electronic governing", working off speed sensors ('speed probes') which are merely frequency sensing devices. The logic is all within the FADEC box, which compares actual rpm (via the probes) to desired rpm (throttle position, limited by speed and acceleration schedules). It then makes a correction to fuel flow.
This meets the very definition of a governor.
There's also the mechanical TOS (Turbine Overspeed) system which is a cable and centrifugal pawl device that cuts the fuel supply in the event of a shaft failure or excessive overspeed.
I have seen a similar system on a shipboard or land-based turbine engine, but never an aircraft gas turbine. Thanks for the enlightenment.