If the GPS or other gauge is configured to open in a separate window you can open it from the keyboard (shift + window #) or from the alt screen.

In this example from a panel.cfg file my GPS is window 2.  Pressing shift-2 opens the GPS window in the same spot on the screen no matter what view I'm in.

Code:

[Window Titles]
window00=Main Panel
window01=Radios
Window02=GPS
window03=Throttle unit
window04=Warning Lights
window05=Caution Lights
window06=Compass
...

[Window02]
size_mm=150,250
position=8
BACKGROUND_COLOR=16,16,16
VISIBLE=0
ident=GPS_PANEL

gauge00=gps!gps,0,0,150,250