A quick search on indexes:
John McGeough baptised 5th July 1820
Tullyallen, Tyrone
Parents: Terrence McGeough, Alicia Nugent
John McGough baptised 8th April 1821
Dundalk, Louth
Parents: James McGough, Rose McGough
John McGough baptised 24th February 1818
Haggardstown, Louth
Parents: Hugh McGough, Ann Conner
Plus
1817, Monasterboice, Louth
And a couple in 1825
Several published trees have Thomas Gough and Elizabeth McKenna as parents if your John is the one who died 1875, Quebec.