i dont believe you actually need the gps file as i have never used one and my gps works fine.
i believe you need
Hard-SPL 2.40-olipro on your device first.
the easiest way to upgrade the radio is to download a radio file from wherever(should be in .rar format)
un-rar it
copy file inside (should be xxxxxxxx.nbh) to a
micro sd (NOT SD
HC) card
insert into device
hold camera btn + power and push reset btn to force into boot loader
it should bring something up and follow instructions
once it says finished, soft reset
All DONE !!