He succeeds his twin brother, David, who won the same event in 2007.
"I am truly delighted with the result," David told Farming Life, shortly after his return from Austria, the venue for the 2008 World Ploughing Championships.
"What made the victory even sweeter is the fact that Thomas Cochrane, from Coleraine, took third place in the reversible ploughing event. If there was a team award on offer, Northern Ireland would have picked up that accolade as well.
"Our success can be attributed to the team approach. We went out to Austria a fortnight before the event to get acclimatised to the conditions. They have had a very hot, dry summer in that part of the world and ground conditions were extremely hard. However, the preparation time allowed us to set everything up accordingly."
At the end of day one, the stubble ploughing, Samuel found himself lying in second place, just eight points behind the Austrian leader.
"That was on the Friday," explained Samuel. "However, it rained all that night and we took the decision the following morning to set the equipment up for day two as we would for ploughing a grass sward back home. And it paid off, as I went on to win the overall event by a single point."
David also paid tribute to the many people from Northern Ireland who travelled to support the team.
"The atmosphere they created over the two days was really tremendous," he confirmed.
Ulster Farmers' Union president, Graham Furey, congratulated Samuel on his tremendous achievement. "This is great news for Samuel and the Gill family as a whole," he added.
"The victory also reflects positively on the entire farming industry in Northern Ireland. Ploughing is such an iconic activity. It goes to the very heart of good farming practice."
Competitors from Northern Ireland have now won 10 world ploughing championships.
The league table is headed by Austria with 11 victories.