is it possible/planned to add the possibility to select the line to push on? As example in EDDP is a BLUE and ORANGE line.
As explained, many times already, GSX doesn't know anything about any lines the scenery developer draws, or any other visual scenery element. The only thing GSX sees of a scenery, are the AFCAD nodes and paths, which is the only data we have available as "lines", since customized ground lines are not even "lines" in a scenery, they are just a bunch of textured polygons.