I ran into some issue recently
Since I'm not satisfied with the number of habitable planets (yeah I don't find the number of planets in immense galaxies that overwhelming as it should be for my tastes), I thought about trying out to build a map, well the TA map editor works but to put hundreds of planet by hand is quite hard, more so since I would have to generate manually hundreds of random numbers for PQ & such.... 
so I got to downloading a map (which is crappy but I didn't know at the time) I was appealed by the number of planets available ( 805 planets ...
) and... guess what.... loading it in the map editor does not work
so I edited it with a text editor only to find big format differences between what the map editor would output and what the xml data of the map looked like. so I got onto the task of a few automated find/replace to bring the output in line.
To cut the story short, the result map perfectly works in galciv2: TA but doesn't in the gc2 map editor 
so is there any map editor out there since I can't find gc2 builder anymore ?