Gillian was educated at Ravensbourne College of Art (BA) and Chelsea School of Art (MA). Elected to the London Group in 1981, she has been their Vice President since 2011. From 1990 -2012 she was Head of Art at Kensington and Chelsea College, London.
Her first solo show was in 1976 at the Air Gallery London. Numerous shows followed. Individual paintings have appeared at London Group shows, John Moores, RA Summer Exhibitions and many others. Examples of her work are in the collections of the Arts Council of Great Britain, Kettles Yard, Unilever, A M Kinney Inc Ohio and in private collections here and abroad.