The GWTG is an entirely volunteer run organization, providing the community of Minto and the surrounding area with high-calibre live theatre for more than four decades.

Operating from the Harriston Town Hall Theatre, a fully accessible facility, the Guild has a long history of staging both well-known favourites and innovative modern shows. In recent years, such popular musical productions as "Grease" and "Joseph and the Amazing Technicolour Dreamcoat" "Sound of Music" & "Oliver" have played to appreciative theatregoers from across Ontario and beyond. The Grey-Wellington Theatre Guild stages productions each spring and fall, and has held Youth Summer Theatre for the past 10 years. On many occasions, a children's Christmas production has been added to the schedule, while the guild has also staged special historical productions during the summer months to coincide with major local celebrations.

Volunteers are always welcome both acting onstage and in backstage roles during productions. Help is needed from front of house, ushering, make-up and costumes, stage management, props, and more!