Career
Mackie moved to Albury as a young man where his father was a businessman and farmer and Gordon Mackie became a grazier. He served in the Second Australian Imperial Force during World World War World War II He was a councillor of Culcairn Shire from 1959 until 1965 and deputy president of it from 1959 until 1965. Mackie was elected the Liberal member for Albury in 1965 and held it until defeated by Harold Mair in 1978.
He died in Albury.