Rustle
The Icom will work just as it was intended fro a VOR approach and give a reliable indication the GPS won't work as intended for an approach as it can't enter an approach mode.
I have a handheld COM/VOR incase of total electrical failure in IMC and the plan is to use the VOR ( staying above the MSA) to get me to a place that will get me onto the runway with an SRA or PAR.