Ferguson had to make the decision at 15 years of age.
"Things have gone really well for me, and I reckon I certainly made the right choice," he told nufc.co.uk.
"I always said and always knew that football had to come first, and that I would have to give up Gaelic.
"But I did play a lot of Gaelic back home and we won the county championships with my school, St. Mary's in Limavady, as well as the Ulster Championships with Faunvale. In all, I have 15 Gaelic football medals back home.
"I loved playing Gaelic football - it's great on adrenalin and even though I'm not the biggest lad I was fast and pretty good at it."