Alright then

Several apps can be added to the desktop that start and stop GPS: Maps, several mapping apps that are faster, camera, several gps trackers.

Since once everyone stops using GPS the daemon powers it down, it's not hard.

And, for the record, I am dedicating half a desktop for this. It's so cool.

As for integrating into interface switcher, I see little reason. It uses nothing when off, it's auto-closing when not needed, I don't see the problem.

OP: Did you enable positioning on your chat/messaging accounts? That would keep GPS active. Set location position to "not show" and you're golden.