Have you tried to edit the Bypass pin location ? GSX surely recognize the front gear location in every airplane and, if the Bypass pin location is unedited, it won't use and will use only the front gear location. However, if the Bypass pin location is edited, even slightly, GSX will see it has been edited, and it will use that, so it must be correct, otherwise it will default to 0,0,0, that is the airplane center.