Why would you want to fly an instrument (in this case GPS) approach to begin with? Above/in cloud? Night? You'd be very brave not to receive a radar service, especially if the airport hasn't been granted a class D CTR; procedural control could be exercised without Radar in this sense. Try explaining to your passengers how else can you be separated from other aircraft, known or unknown, or sequenced in the landing pattern?
Are you a pilot?