Hey,
I've noticed that routemaps sometimes don't show, be it in airline routemaps, or airport ones.
This happened to me in last round, and it is happening now in LHR
First, i thought that GCM had trouble with bigger maps, or had a maximum on routes, but i might have discovered the problem. When I right-clicked and clicked "See Image", GCM tells "Unknown Airport Code: LLR" Which is Llanbedr Airport, and it seems that it is not loaded into GCM...