Five successive Pool One victories have seen the Cherry and Whites clinch top spot with one game to spare and another triumph this weekend will see them guarantee a home quarter final.
With that in mind, head coach Nigel Davies has resisted the temptation to ring the changes.
Martyn Thomas starts at full-back, while hooker Koree Britton lines up alongside Nick Wood and Shaun Knight in the front row.
Will James and captain Jim Hamilton form the lock pairing with Tom Savage, Akapusi Qera and Sione Kalamafoni making up the back row.
Gloucester: 15 Martyn Thomas, 14 Charlie Sharples, 13 Henry Trinder, 12 Tim Molenaar, 11 Jonny May, 10 Freddie Burns, 9 Dan Robson, 8 Sione Kalamafoni, 7 Akapusi Qera, 6 Tom Savage, 5 Will James, 4 Jim Hamilton (capt), 3 Shaun Knight, 2 Koree Britton, 1 Nick Wood. Replacements: 16 Huia Edmonds, 17 Dan Murphy, 18 Dario Chistolini 19 Peter Buxton, 20 Gareth Evans, 21 Dave Lewis, 22 Billy Twelvetrees, 23 Shane Monahan.
Mont-de-Marsan: 15 Yohann Durquet, 14 Jordan Beaulavon, 13 Simon Lucu, 12 Tamaz Mchedlidze, 11 William Ryder, 10 Jean Baptiste Claverie, 9 Arnaud Pic, 8 Alexandre Ricaud, 7 Vincent Farre, 6 Yann Brethous, 5 Scott Murray, 4 Sebastian De Chaves, 3 Tevita Mailau, 2 Thomas Bordes, 1 Julian Fiorini.
Replacements: 16 Pierre Correia, 17 Morgan Phelipponneau, 18 Eric Dos Santos, 19 Aldric Lescure, 20 Julien Cabannes, 21 Alexandre Douvesy, 22 Thibault Duvallet, 23 Mathieu Giudicelli.
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The Barbarians are one of the top invitational rugby sides with a long history and classic rugby jersey.
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The Lions are ready to get their Australia tour underway. They arrive in Perth on Monday.
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The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.
