[GnatGoSplat]

It's the OS. The GPS should still work in a cooked ROM if it worked before. The radio itself is GPS-ready, but there are 3 files missing from the ROM that enable GPS.

I suppose they could be cabbed. I'd test that theory myself, except I already flashed my phone and installed all my apps and don't feel like erasing everything just to test a theory. Anyone want to try a cab file to enable GPS in the stock Alltel ROM? I could make one pretty quick when I get home from work later in the day.