Born Vicki Filion in Vancouver, British Columbia, she was raised in a home surrounded by media personalities. Her father's best friend, author Pierre Berton was influential in her life, exposing Vicki to the greatest intellectuals and stars of the 1950s and 60s.
Gabereau moved to Toronto at age 18 for university. While there she married Michel Gabereau and worked a variety of jobs, including as a professional clown. In that capacity, she ran for Mayor of Toronto in the 1974 municipal election under the pseudonym Rosy Sunshine.
In 1985, she became host of Gabereau, a two-hour daily interview show on CBC Radio. She was one of the CBC's most popular and beloved hosts until her departure in 1997, when she moved to CTV. Her radio program was replaced by Richardson's Roundup, hosted by Bill Richardson.
Gabereau has also published an autobiography, This Won't Hurt a Bit, and a cookbook collecting some of her favourite recipes sent in by her CBC radio listeners.