The GUI retained the Governor Hugh L Carey Challenge Cup when they halved the singles and tied 6-6 with the Metropolitan Golf Association of New York at Galway Bay.
Tied 3-3 after the foursomes and fourballs on Wednesday, the sides won three singles apiece to leave the match tied overall.
As holders, the GUI retained the trophy.
The Americans won the top two matches with Castle's Alex Gleeson falling 4 and 3 to Darin Goldstein and 16-year-old Kilkenny debutant Mark Power losing 2 and 1 to Ethan Ng.
Wins for Naas duo Conor O'Rourke and Jonathan Yates put the GUI in front and while Kevin Le Blanc only fell at the 18th, Colm Campbell had a clear-cut 4 and 3 win over Stewart Hagestad to claim the GUI's third point.
Governor Hugh L Carey Challenge Cup, Sponsored by Corrib Oil, Galway Bay Golf Resort
GUI 6, MGA of New York 6
(GUI retain trophy as reigning champions)
Thursday 18th May
Singles (GUI names first)
- Alex Gleeson lost to Darin Goldstein 4&3
- Mark Power lost to Ethan Ng 2&1
- Conor O'Rourke beat Brian Komline 3&2
- Kevin Le Blanc lost to Trevor Randolph 1H
- Jonathan Yates beat Tyler Cline 3&2
- Colm Campbell beat Stewart Hagestad 4&3
GUI 3, MGA 3
Results - Wednesday 17th May
Foursomes (GUI names first)
GUI 1, MGA 2
- Conor O'Rourke & Jonathan Yates beat Brian Komline & Trevor Randolph 2&1;
- Alex Gleeson & Kevin Le Blanc lost to Stewart Hagestad & Darin Goldstein 2H;
- Colm Campbell & Mark Power lost to Tyler Cline & Ethan Ng 3&2
Fourballs (GUI names first)
GUI 2, MGA 1
- Alex Gleeson & Kevin le Blanc lost to Brian Komline & Tyler Cline 1H;
- Colm Campbell & Mark Power beat Stewart Hagestad & Ethan Ng 3&2;
- Conor O'Rourke & Jonathan Yates beat Trevor Randolph & Darin Goldstein 5&4
Overall GUI 3, MGA 3