The goals took the veteran striker's tally for the season to seven and was Orient's consolation for their midweek FA Cup defeat by Tranmere, while consigning Rovers to bottom place in the table.
McGleish said: "It was disappointing on Tuesday. While a cup run would have been nice, the league is the main thing for us. We want to push on in it.
"We got the ball down well and passed it. It is that what we have been trying to do all year. It is the manager's philosophy. At the end we still had the composure to get it down and play."
He added: "As a scorer I always say I could do better. I always try and do the best I can, seven goals is about average. I could have had more but that is the pressure I put myself under."