Gilliam didn't play long enough, so he won't be considered.
Unfortunately, I don't think Doug will be seriously, if at all, considered either. And that's a shame. In his first five years, Doug was solidly the reason why Tampa Bay made the playoffs the years that it did. However, he didn't get as much credit as he deserved during that time. I still remember the criticism by some that he "threw the ball to hard". And to me, it's crazy to say a QB has too much arm-strength in that leaque; especially when Elway was doing the same thing and being praised for it.
Doug's WFL days will hurt him also. Plus, the year he won the superbowl, Jay Shroider (or however he spelled it) started for a good portion of that season. Joe Gibbs got most of the credit for winning the superbowl, anyway, although he never played a down.
Regards.