I think GPS should stay on. I'm a newer player to IL-2, and I'm still learning how to effectively fly my aircraft. If I have to watch all my gauges and keep a constant eye on my map while also keeping an eye out for enemies, it'll be too much for me. I consider GPS to be my "pilots memory". I am just plopped into the middle of a battlefield that I've never been to before, but my pilot character know she the nearby area and should have a basic idea of where he is. However, if it wasn't made so that GPS updated after 15 seconds of looking at the map I think that could be a fair compromise as the pilot would "get his bearings.