Michael Fitzmaurice said the move was a “masterstroke” – and compared the country's swoop to a last-minute substitution in a football match who wins the game.
He told the Irish parliament this week Dublin should try to mimic Madrid and secure a veto over the post-Brexit future of the north of Ireland.
The Teach Dala for Rosscommon-South Leitrim said: “It is good to see that Northern Ireland is recognised [in the EU’s Brexit papers]. It is vital the Peace Process is kept going.
[Spain] got a veto on Gibraltar which I think was a masterstroke
“But [there is] one thing I think where we have lacked.
“Spain were like a super sub coming on late in the game to win the game at the end of the day. They jumped in at the last minute and got a veto on Gibraltar which I think was a masterstroke.”
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Irish TD Michael Fitzmaurice said Spain's Gibraltar veto was a 'masterstroke'
Spain’s veto over Gibraltar, a British overseas territory, has been hugely controversial – leading to sabre-rattling on both sides and tension and anger on The Rock.
READ MORE: What does Brexit mean for Gibraltar?
The issue of Gibraltar after Brexit is being fiercely debated by London and Madrid
On the day Mr Fitzmaurice spoke to parliament, the British Royal Navy was forced to chase out a Spanish vessel when it intruded in Gibraltar waters.
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The Irish politician, however, said Madrid’s political tactics should be admired – and called on the Republic to push for a veto on Northern Ireland, which voted 57 per cent in favour of Remaining in the EU.
Things you may not know about Gibraltar Mon, April 3, 2017
Gibraltar is a confusing place, especially if you have never been yourself
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Gibraltar has its own political system that makes many decisions within the territory but issues like defence and foreign affairs are determined by the UK Government in London
He said: “The one thing you worry about is that, if there isn’t an agreement, we’ll end up with a hard border.
“There can be a part of a country, for the sake of it Northern Ireland, which doesn’t need to be in Europe or not in it. It should be allowed to trade [tariff-free with the rest of the island].”
Michael Fitzmaurice said Spain's Gibraltar move was a 'masterstroke'
He did sympathise with Brexit voters, whose lives he said had been “intruded” on by an ever-more controlling EU.
Mr Fitzmaurice said: “People wonder why did the likes of the Brits vote to get out. the reason they did is that the ordinary person on the ground is fed up of rules, regulations and red tape.
“An awful lot of it has intruded on the lives of people in different countries.”
He also called for an Irish referendum on whether the country should accept a hard Brexit.