Best of Friday night's Play-Off Semi-Final second leg
Gregory was on hand to steer home The Lions' opener following excellent work by striker partner Steve Morison and although the Bantams levelled two minutes before the break courtesy of Jamie Proctor's close range shot.
The Lions defended resolutely to prevent Phil Parkinson's men adding to their tally after the break and dug in to clinch a fourth Wembley appearance in just seven years.