Career
He was elected to the United Kingdom House of Commons at a by-election on 21 February 1893, after the result of the 1892 general election in North Meath was overturned on petition at the next general election, in 1895, Gibney was re-elected with a narrow majority over the Parnellite candidate John Sweetman. At the 1900 general election, when the Irish Parliamentary Party reunited after its 9-year split, Gibney stood as a Healyite Nationalist and lost seat to the Irish Parliamentary Party candidate Patrick White.