Internationals have been played in the GAA since the first trips to New York in the early 20th Century. From 1924 to 1932 Ireland played the United States at the Tailteann Games. The 1947 All-Ireland Final was played in New York, and from the 1950s onwards, Internationals were played between the All-Ireland or National League Champions and New York or Australasia. More recently there has been Internationals between World Countries, such as Italy v France or Galicia v France.
International Rules matches can be found at the International Rules Page here:
GAA Football Internationals
GAA Football All-Ireland Championship 1947
GAA Football St. Brendan’s Cup 1954-1960
GAA Football World Championship Cup 1967-1969