Gill gained her RGN (Registered General Nurse) in 1981 at Jersey General Hospital. She initially worked as a Staff Nurse on the male surgical ward and in 1989 became a sister on the then short stay surgical ward. In the 1990s Gill went to work for Jersey Hospice and did her palliative care training in Canterbury. Later she went on to complete her management and teaching certificates.
Gill started working as a practice nurse at Island Medical Centre in August 2010. Within the practice her special areas of interest are the travel clinics and palliative care.