Click on the Help button (lower right corner of main menu) then "Moving Map" under "Help System" and scroll the right pane down to the portion with the blue heading "GPS Status" There you will find those entries described. If you can't navigate the help to find that information, better not fly with the software.
There are three videos that should also prove useful for those who disdain reading the help (yes, I wish they had a traditional manual too):
