Well I just watched the video on youtube that
jafflyer posted, I really don't see how the GPS had anything to do with this moron hitting the ground, I have thousands of hours using a GPS similar to the one sitting in this AN225 (!!!!!!!!!!!!!!).
One must use a little bit of common sense, like verifying accuracy with a known object, a technique most Airbus pilots are familiar with. I'm not advocating anyone using one of these devices illegally, but in some parts of the world, there are no IFR approaches. Be safe.