The United travel to Quins having finished second in the Northern Conference table, with the home side having topped the Southern Conference.
Gloucester won four out of their five group fixtures, only tasting defeat on a bleak evening in Newcastle, while Harlequins won four and drew one of their six games.
The A League campaign has proved to be a beneficial one for Gloucester this season, with several players producing performances that have pushed them into first team contention.
And Burns confirmed that, whoever wears the Cherry and White at the Stoop, will have the backing of the whole squad.
"We got the result at the Madejski that we wanted. We now move on to Monday and make sure that the boys who aren't playing on Monday, are there supporting and wishing the other boys well for the A League semi final.
"There's just a great club spirit. It's not just about the team, it's about the club. Everyone at Hartpury and Kingsholm, whether it's the catering staff or the backroom staff, helps to create this spirit.
"There's just such a great feeling at Gloucester and we're all wishing each other well in everything we do.
"So, we'll all be up there on Monday evening supporting the United in the A League and then we'll start thinking about Irish again next Saturday."