The Gregor System was a binary star system in the space of the Anderman Empire 49 light-years from New Berlin. It was the location of a terminus of the Manticore Wormhole Junction 180 light-years from Manticore. (HH3, HH4, HH6)

The terminus was associated with Gregor-A, an F9 star belonging to the Star Kingdom of Manticore, while Gregor-B belonged to the Anderman Empire. Containing one habitable planet, Gregor-B had been the home of the Gregor Republic, which fell apart in a civil war and was annexed by the Anderman Empire around 1869 PD. (HH6)