Assuming with "jetway", you mean a jetway of a default airport that has been replaced by GSX, fact it works with the PMDG but not the Concorde, should tell by itself the problem is the airplane doors definition.
It's important to stress that, GSX jetways are just visual replacements for the default models, but nothing in GSX controls the way they move or animate, it's completely controlled by the default jetway animation system, and GSX just send a command to toggle their status, exactly as you were calling the jetway from the default ATC menu.