It possibly wouldn't have existed until a much more modern era when the cost would have been less, sure. But someone (Google hint hint) would definitely invest in GPS if they thought it would make them money. Besides, I don't think you can really compare GPS with say, making explosives that can reach a greater blast radius. My point was that to simply say "well, some Army projects can be used for bad and for good" does not justify the engineering of technologies that are clearly meant for killing.