News of his death was posted on Facebook by his son, Chris:
"Today the world fell apart for our family, my beautiful dad passed away in the early hours of the morning, 64 years young he lost his battle to the most disgusting disease. Me and my family are broken hearted and nothing will ever fill the void in our hearts RIP my hero my best mate my dad xxxxx."
The Scottish midfielder joined the Millers in 1982, made 61 appearances in all competitions and scored four goals.
RIP Gerry.