The New Eden system is a dead-end star system with a single, barren, moonless planet orbiting its sun. So, there is not much mining or colonization going on. Yet it is often a busy system as explorers, pigrims and adventurers have been traveling towards Eve Gate since time immemorial. There is something mesmerizing about these dancing wisps of plasma, something enticing and inviting like a siren's song that draws you near.
During the capsuleer age, possibly the "Goners" are those that got the farthest using subwarp propulsion. They are pilgrims, who use corvettes to slowboat towards Eve Gate in complete solitude for the rest of their lives. They reached spots just under thirty AU away from the closest celestial body. When there are Goners around to continue their journey, anyone with decent enough scanning skills to probe down their corvettes can make a bookmark.
The Death Korps of Krieg. must have gotten hold of such bookmarks.
At about 20 AU from Promised Land Gate, in a straight line towards the last recorded Goner locations, they built a secret outpost. This places the outpost outside of d-scan range for visitors to the system.