There's a train destination for Galaxy City, however it drops you at one of the tunnel entrances rather than the tram station, and the tram station itself doesn't work. Might want to either knock that one off the list, or fix it.
That's a known issue and sort of intentional.
Since one of the primary groups that would have a use for Paragon Chat is roleplayers, and since Galaxy City was a favorite hangout for RPers (especially on the European servers), the goal is to elevate it back to a tier 1 zone. Whether Paragon Chat represents a fixed point in time before it was destroyed, or a parallel timeline where the meteor hit somewhere else and the other events leading up to I24 still happened, the end result is still that it's available as a location.
I had previously done some experiments on the live servers, mostly using the bugged arcane SG porter that got missed, later the long-range teleport exploit. So I knew that the non-echo zone still existed, but the trainer and contact NPCs had been removed, probably to keep missions from accidentally sending you there. With PC my plan was to eventually add those back using the same method as Ascendant and Mender Sally, as special NPCs not present in the map file that the 'server' spawns anyway when the right zone is loaded.
However, upon hooking it up to the monorail, I quickly discovered that the door beacon and spawn point had been removed as well. Those will be a bit more annoying to fix, but not impossible, so I decided to leave it for now since we do have mapmove/mapmenu available. Hence the following comment in the default travel.cfg file:
# Argh, the spawn location and door beacon for the monorail was
# deleted from the map. Will have to hack in a hardcoded
# workaround at some point.