I was just doing this myself! 
Please see this thread: Help with the "Create New Binding" option in 1.3.x plugin
Try changing the import statements in the framework file to just fileName.h instead of GoogleMobileAds/fileName.h
I was just doing this myself! 
Please see this thread: Help with the "Create New Binding" option in 1.3.x plugin
Try changing the import statements in the framework file to just fileName.h instead of GoogleMobileAds/fileName.h