If you are ever inclined (or have to) remove the fairing (aka Cowl) on your GL1800 Wing, there is an undocumented "step" that you need to be aware of in order to get it off the bike.
Hopefully the following link will work for you; however, if not, let me know and I will re-create a post here with the info.
http://gl1800riders.com/forums/showthread.php?335313-Removing-the-Fairing-question(s)
See my posts #15 and #21 in the above link.