I too have tried to gather imformation on the Gillingham's in NFLD. I am the great grand daughter of Thomas & Eliza Gillingham. My Grandfather moved from his family home as a young boy (14) from NFLD to Nova Scotia, never to return again. It was common knowledge to all, we were never to ask anything about his family he left behind. After my Grandfather's passing, my mother found a government docoment that my grandfather filled out (all hand written), when applying for his senior pension. Listed on this docoment were a list of his parents and sibbling's names.
Also recored on tidocoment was the name of the school my grandfather attended: St. Anthony Public School. He made his career the Canadian Navy and was stationed in Halifax.
My mother is an only child, and has always wanted to make contact with any family member, on her father's side. If you have any imformation you can pass along, my family (mother) would certainly appreciate your kindness.