Dublin born, Gráinne graduated in Fine Art from the Institute of Art and Design, Dun Laoghaire, in 1979.
Her post graduate training was in etching and lithography at both Graphic Studio Dublin and Black Church Print Studio Dublin. She was awarded a Fulbright Scholarship to study Lithography at Tamarind Institute, New Mexico. She worked and studied under Giorgio Upiglio in Milan and under Norman Ackroyd at Central St. Martin's, London. She has worked and lectured in Vastervick, Sweden.
Gráinne is a member of Graphic Studio Dublin, Fins Graefisk Vaerksted in Denmark, and is she a Fulbright Alumni.