Hey guys: Over at howardforums a manual was posted
ftp://up.ppcgeeks.com/Vogue/XV6900.pdf . On page 32 there is some mention of the GPS radio: "External GPS Set the appropriate GPS communication ports, if required. You may need to do this when there are programs on your XV6900 that access GPS data or you have connected a GPS receiver to your XV6900. See Help for details."
Also on page 54: "Location Setting: Allow the mobile phone network to detect your current location via your XV6900’s built-in GPS chip. This is especially useful in times of emergency. On the upper right of the Phone screen, one of these icons will be shown: ON (your location can be detected) OFF (your location cannot be detected except by 911)"
Also page 147: "Amber light for GPS status."
Not sure if that helps or not, but I thought I would help save some time from having to search the manual yourselves.