"It feels amazing to kind of tick the boxes down here in Australia now. I guess they've come fast in the end but it's been a long road to get them all,'' said Scott, who dedicated the win to his parents, particularly father Phil - a PGA of Australia member.
"Really proud - the PGA's meant a lot to me and my family so I think this is an incredible win, a very memorable one for me being here on the Gold Coast as well.
"This is the icing on the cake.''
Scott joins Greg Norman, Peter Senior, Craig Parry, Peter Lonard and Robert Allenby as the only men to have won all three of Australia's major golf tournaments in their career.
It also adds a domestic triumph to his three international tournament wins and more than $5 million in earnings for the year.
"With it being the one that I hadn't won down here, I really wanted it bad,'' he said.
"A special win for me - I've felt incredible support from the crowd ... I could feel them getting nervous as it got close out there for the first 10 or 12 holes.
"Them cheering me on to get the win was a good feeling as well.''
Scott's win looked far from assured before the delay as his two-shot overnight lead was whittled down by chasers Rickie Fowler (68) and Jack Wilson (68).
A bogey on the par-4 ninth allowed American star Fowler and Victorian trainee pro Wilson to move within one shot of the superstar.
Wilson's brave bid to create history faltered however when he double-bogeyed the par-3 14th, the 23-year-old eventually coming home in third with an eight-under 276 total.
Fowler, the 24-year-old rising star from the United States, made six birdies in his round but three bogeys, including two after the rain, ensured he finished second on a 10-under total of 274.
"I was looking forward to giving Adam a little bit more of a challenge there but it was a great week,'' the world No.43 said.
"He came out and, first hole, he made eagle and all I could do was make birdie there ... I made two bad swings that cost me after that.
"He made some great swings coming down that last stretch.''
Scott will turn his attention to defending his Australian Masters crown next week at Royal Melbourne before teaming up with Jason Day at the same venue the following week for the World Cup.
His final event in a gruelling four-week schedule will be the Australian Open at Royal Sydney from November 28 to December 1.
- AAP
