*shrug* it's pretty quick to add a GPS to a panel, only a couple of lines and can be done in a matter of minutes.
Go to your FS9 folder, then the aircraft folder, find the aircraft you want, go to the panel folder, and open panel.cfg in notepad.
Find "[Window Titles]" and pick the next sequential number
In this example the next number is 02.
Thus add the next line using that number:
Now anywhere in the file, add one of these sections, except change 02 to the number from before.
If you want the smaller GPS295:
Alternatively the bigger GPS500
All in less time than it takes you to whip out your credit card.