Gilbert was a broadcaster with CJCH Halifax, which was acquired by CHUM Limited in 1970. In February 1971, Toronto's 1050 CHUM announced that he would succeed Larry Solway as host of the talk show Speak Your Mind. In 1973, he became the most successful radio talk show host in Canada with 120 000 measured listeners, more than Vancouver media legend Jack Webster. Gilbert's term with CHUM ended in 1977.
