Hello Clemen!
You can make your own skin for ShowGPS.
Easy by mouse in the program.
Go to Options -> More Settings -> Displays+Instruments
Disabled all you donīt need.
Then go to Display and make sure that no other skin is in the textbox and that "Menu remove"+"in the foreground" is enabled.
Save all by OK.
Now, go to Surface-> Disabled "Lock Surface"
Move the Displays or Text in ShowGPS to the position you like and by this resize ShowGPS.
Then press Key F8 to Remove the Menu.
Start ShowGPS with F2.
Okay, its a little work, but now its simple.
Bye
My english is bad...