And hey - if a pilot needs GPS in order to fly then that person is not ready to be a pilot and most certainly not a commercial pilot. If you're interested, there is research being done on pilot over-reliance on technology. Here's just one article I found on it. medium.com/faa/the-dang...
The Dangers of Overreliance on Automation
Safety Concerns and Mitigation Strategies for Pilots
medium.com