it is a sold software, it is not available freely. it has been sold in a preprogrammed protected pic chip.
go to the author web site and buy it it is cheap.( I dont know if it's still available)
by the way, dont loose time with an almost abandonned project, go and buy a pickit2 or 3 it's cheap also and will work with all pics
(which is not the case of the gtp usb even if it has been an excellent programmer)
regards,