slick204, I hope that you like the ability to toggle the text mode on and off, since you were the main reason that I tried to do something like that -- even though it may not be exactly what you requested in post #26 of this thread
As for the GPS mode, well, I have not studied that mode for a long time now, but referring back to the README file, it indicates that putting a GPS 'mode' of 'lock' in the 'ini' file will result in the GPS just trying to establish a *single* lock on the GPS, and thereafter ignoring it. This may be what you are asking for (?). No, no settings (including GPS stuff) is saved back to any file.
As for the 'twilight' times, no, I wasn't able to find any room to record those 'textual' values anywhere -- especially on the 'bar' display, which is already so full that I had to squeeze the lines closer together. Are you asking for a 'text-only' mode of some kind that would include that? Maybe some people don't want graphics at all? I can note, however, that I *did* manage to squeeze the sun/moon alt/az onto the screen so that people knew 'textually' what the current locations in the sky were...