Here we go again...
radeng - There are millions of light aircraft movements every year, many with the pilot carrying a handheld aviation GPS right next to the avionics.
You're reasoning suggests that these pilots are heading for the inevitable. When should that have started happening? A year ago? Two years ago? When will these "sooner or later" accidents start happening?
If the boss says no GPS, no GPS it is. But don't extrapolate that into a safety argument that is patently without foundation.