Gregory's Server@organicmaps using a laptop, no phone, so I use it to navigate in the classical way. Know more people that do it like this, someone uses it on a Steamdeck. More private when no WiFi and Bluetooth used, and also just a way more engaging way to travel. But sometimes gps would be handy.
Would the flatpak work with USB GPS?
@fredy_pferdi there is a QT location module, it may work with an external GPS devices.