You can have GPS fitted at a BMW dealership but its going to be costly, a friend of mine did it to his 740i , basically all the seats ,carpets and half the dash have to be removed for all the wiring as the unit is fitted in the boot, so it depends how deep your pockets are really.
So hense them saying no, not just as simple as putting it on the idrive, if you had have said can you fit it as a retro they would have said yes with a big smile.
VELVET BLUE UK INDIVIDUAL , IM THE LAST
UNITED WE STAND DIVIDED WE FALL
I stepped in a plate of Pasta the other day - now I have to worry about my Carbonara footprint!