I was out of the USAF by this time, so I have no direct knowledge. But I imagine they did a risk assessment over the possibility of the Iraqi forces gaining acc

I was out of the USAF by this time, so I have no direct knowledge. But I imagine they did a risk assessment over the possibility of the Iraqi forces gaining access to GPS, either because they bought commercial receivers, developed their own, or got loaned some from more-capable country who would have liked to have seen the US + coalition fail.