Gilbert's Hartpury team mate, Jonny May, a member of the Gloucester Rugby Academy, starts in the centre.
With Cornwall upsetting Devon at the same time Gloucestershire know they will face a difficult game against a team of wounded Devonians in the Kingsholm encounter.
Gloucestershire's final game is against Cornwall at Cinderford on May 23rd, kick off 3pm. The winners of the four-team pool go straight into the County Championship final where they will battle for the Bill Beaumont Cup at Twickenham on May 30th.
Tickets will be available on the day of the game priced at £7 for Adults and £3 for Juniors in the C&G Stand.
The Kingsholm ticket office will be open from 11am until 3pm for more information or to book tickets call 0871 871 8781 option 2.
15. Jones C. (Lydney); 14. Holder B. (Lydney), 13. May J. (Hartpury), 12. Scourfield D. (Cinderford), 11. Carter J. (Cinderford); 10. Stevenson T. (Cinderford), 9. Knight P. (Cinderford); 1. Long M. (Birmingham Solihull), 2. Finckin P. (Newbury), 3. Kennedy P. (Cinderford); 4. Bufton D. (Dings), 5. Cadman R. (Hartpury); 6. Gillbert M. (Hartpury), 7. Jenkins D. (Lydney), 8. Panaho M. (Dings)
16. Hall C. (Cinderford), 17. Price P. (Lydney), 18. Waldron W. (Hartpury), 19. McNeil C. (Cinderford), 20. Pointon D. (Stourbridge), 21. Williams J. (Lydney), 22. McCrae A. (Cinderford)