Your value is going to be the following:
Application.GPS.X
Application.GPS.Y
As in: msgbox ("My X Coordinate for the GPS is: " & Application.GPS.X)
The coordinates should return in whatever your coordinate system is for the map doc you're in.
If you want to load this, write a simple subroutine into your VBScript file:
'Sets the editboxes named 'txtXCoordinate' and 'txtYCoordinate to their X and Y Coordinates respectively
Sub OnOpenForm
txtXCoordinate = Application.GPS.X
txtYCoordinate = Application.GPS.Y
End Sub
Now, all you have to do is Set your Form's "OnLoad" object to "OnOpenForm," and Presto,
COORDINATES!