...then just to complicate things a little

you would probably want to add an on/off toggle for the GPS and maybe a GPS/NAV switch too for auto pilot use.......open the panel.cfg in say the c172 and copy and paste the two entries ...gauge29=SimIcons!GPS Icon, 927, 366 and gauge16=Cessna!Nav GPS Switch, 343, 364 to YOUR aircraft panel cfg gauges list renumbering them as appropriate...they won't maybe appear in the position you want them but you will have to fiddle with the pair of numbers (positions on the display) to get them where you want them.......fiddly but fun.....commoner

BTW...back up your panel.cfg file before messing around.
.....and finally if you can't do this stuff...post the actual aircraft and where you downloaded from and some body or I will sort it for you....good luck.....commoner
