Hiya,
Did you check what the result of le_pos_Get2DLocation() in the function GetCurrentLocation() returns? Not just that it is LE_OK - but what it really returns? This return value will give you some more info about what is really going on.
Note that you will need a good GNSS antenna on the mangOH green platform before you will get a fix. Have a look at the Unable to get GPS fix forum post for some more discussion about antenna selection.
ciao, Dave