i dont even know what type of address that gps units use, i dont believe the satelittes assign a address to every device that connects to them.
on a small scale like this, the gps chips are receivers only, only have extra hardware to transmit that signal over bluetooth. meaning that, the module has no way to broadcast anything UNLESS its over the intergrated bluetooth radio.
check out this link for a minimalists explanation of gps...
http://www.nasm.si.edu/gps/work.html