Once González Amorosino arrived back from the World Cup to his new club Montpellier, he started very well and was named by French rugby newspaper Midi Olympique as the player of the round 12. He was part of Argentine squad for the 2015 Rugby World Cup in England. In October 2015, it was announced that González Amorosino had joined Irish Pro12 side Munster on a three-month contract. Amorosino made his European Rugby Champions Cup debut on 14 November 2015, coming off the bench in Munster's opening 2015–16 pool game against Treviso. At the conclusion of González Amorosino's Munster contract, he was announced as a member of the squad for the 2016 Super Rugby season.