Gill is Professional Advisor for Young People's Strategy with the Scottish Prison Service, working with SPS staff and partners to support changes to 'use the time a young person spends in custody to enable them to prepare for a positive future'. She chairs the Improving life Chances Implementation Group of the Youth Justice Improvement Board.

Gill was a teacher and researcher and subsequently was involved in inspection and improvement in a range of sectors of education and justice, and the development of Curriculum for Excellence.