Gearóid Arthur Hayes (b.1980), is an artist from Limerick, Ireland. He received his early education at Clongowes Wood College before progressing to University College Dublin to read Law and Business. He moved to Florence in 2003 to study fine art at the Accademia Italiana but transferred soon after securing a place at the prestigious atelier of Charles H Cecil where he received his classical training. This was supplemented by periods of study at Sarum Studios, Salisbury, under the tutelage of Nicholas Beer. In the autumn of 2008, he returned to Ireland to establish his portrait practice. Until recently Hayes was the principal instructor at the Dublin Drawing School.

In 2018 he completed his MPhil at Trinity College Dublin where he is currently engaged in doctoral research on the work of Irish artist, Walter Frederick Osborne (1859-1903). Hayes has consulted on Osborne attributions for cultural institutions, private collectors and international auction houses, such as Christies and Bonhams. In recent years he has been responsible for a number of significant reattributions, most notably in the collections of the Royal Irish Yacht Club and the Office of Public Works, Ireland. For his work in portraiture, he received the Adams Award at the Royal Hibernian Academy in 2011 and was shortlisted for the AIB Portrait Prize at the National Gallery of Ireland in 2024. Hayes is represented by the Gorry Gallery, Dublin, and is currently building towards his first solo exhibition, scheduled for the spring of 2026.