The Irish put the pressure back on straight away and a jinking run from Grix saw him touchdown and McNally added the extras as Ireland looked comfortable at 12-4.
Grix continued to show fine form and a deep kick from the stand off forced a goal line drop out.
Scotland again fought back but strong defence from Andy Kelly’s side kept them out and that was rewarded when, with just two minutes left in the half, Liam Finn sold the Scottish defence a mesmerising dummy and strolled in between the posts.
McNally once more added the conversion to leave the score at 18-4 at half time.
Scotland coach Steve McCormack gave his side a rousing team talk at the break and they came out all guns blazing.
His namesake Andrew did the same just moments later when he found a gap in the Irish defence and with Lee Paterson knocking over the conversion the Scots drew to within four points of the hosts.
From the scrum, man of the match Dale Ferguson drew the sides level after picking the ball from the back of the scrum and fighting off three tackles; Paterson’s conversion putting his side in front for the first time.
The stand off then topped that off with a pass which put full back Brett Carter over to widen the Scottish lead.
Ireland were on the ropes and Mitch Stringer landed the killer blow, the big prop crashing over the Irish line to make the scoreline 18-32 to the visitors.
The Wolfhounds did fight back but Jamie O’Callaghan lost possession with a two on one over lap in hand.
They did manage to pull out another score when Gillam bagged his second after a long pass from Finn put him through.
However, that was to be the last the Irish crowd had to cheer as two more tries from Ferguson and Joe Wardle killed off any hopes of a comeback.
Line-up: McNally, Bergin, Haley, O’Callaghan, Gillam, Grix, Finn, Boyle, Beswick, McDermott, Finnigan, Grix, Ambler. Subs: Taylor, Kerr, Ashe, Fox.
Tries: Gillam (5, 65) Grix (15), Finn (38)
Goals: Greg McNally 3/4
Line-up: Carter, Arnott, Lunt, Henderson, Wardle, Lindsay, Paterson, Wilkes, Fisher, Stringer, Szostak, Barlow, Ferguson. Subs: Henderson, Lowe, Coupar, Howieson.