Realism would ask for a GPS. I don’t know anyone who flies without at least a mounted GPS today. Flying into restricted airspace is a crime, to know where you are reduces stress and you can focus on flying. If you need to land and look for an airport the GPS is easy and fast and much better than folding the paper ICAO charts. IRL I never fly without GPS. My club’s WT9 has a Dynon D1000 with a moving map on the right screen and the C172 has a mounted Garmin Aera 795.
GPS is available for free so there is absolutely no reason not to use it.