Corrosion issue
hiya
yeah I have a 08 GSA also purchased in Kearys. same issue.. I have a rust patch inside the hollow of the rear wheel, the front engine cover was falling apart. all the black frame had mottled rust everywhere. Particularly bad was the center stand area, and around the luggage rack.
my bike was the same as yours, covered or garaged. I approached BMW Ireland who told me to bog off in no uncertain terms. I got a letter from the head of BMW engineering Ireland, who said the corrosion was in no way a manafacturing defect (never mind the EWS, fuel pump, and final drive failures)
in the end due to advancing corrosion damage to the main bolts and fastening nuts in the subframe which compromised the structure of the bike, I had to get the entire frame replaced. (BMW were not happy about that)
there are others on this forum had the same issue
see this link
http://www.ukgser.com/forums/showthread.php?t=186313
there is to my knowledge about 8 riders who have brought this up with Kearys, who are very helpful and will assist you with your complaint, one of which is going to court ( I can give you the guys name in a PM if you need it)
this chap in question has been told like you that it is not a fault even though he is in warranty, but BMW told him to bog off as well. So he is going to court to try and get them to stand by the warranty on a all terrain adventure bike which rusts in the rain...
He has got has a solicitor and vehicle inspector who gave him a letter stating this is a metal issue and nothing to do with storage.
but you really need to fight this one
I have since coated my new frame in ACF-50 to stop this happening again
but best of luck with your issue