The £13million deadline day signing from Rennes was just 21 minutes into his top flight bow - having replaced Danny Welbeck at half-time - when he slotted home Jordan Henderson's expertly measured cross.
The Ghanaian international promptly burst into a funky new dance routine before he was mobbed by his team-mates.
Cool customer: Asamoah Gyan took just 21 minutes to break his Sunderland duck
'Physically, I was on my feet and I did a dance after the goal, but I was really tired and did not want to continue,' he said.
Sunderland had been earlier reduced to 10 men after Lee Cattermole was sent off the second time this season.
Promises: Gyan has vowed to wow the Black Cats crowd after his 'perfect' debut
However they continued to have the better of the chances, the best of which Gyan took with aplomb, labelling it one of the finest of his career.
But the striker also saved special praise for the creator.
'I think my goal was really nice,' he told the Sunderland Echo after the game. 'Perfect. The goal was very, very amazing and it was great that it was for my new club.
'Jordan (Henderson) did so well, taking one man on and producing a perfect cross to create my goal.
'It was one of my best goals, though - I don't score goals like that all the time!'
After Cattermole's dismissal for two bookable offences, Gyan feared he may not get the chance to play at the DW Stadium.
'It was really, really difficult for us after having a man sent off in the first half and, being a striker, I did not expect to get on because of that,' Gyan admitted.
'I thought it was possible I might get on with 20 minutes to go, but the manager did so well tactically and I thank him for having confidence in me.
'The manager knows I am a typical number nine who can keep the ball on the flanks for the rest to join in. That was what he planned and it worked for him.
'I am someone who is unpredictable. I can score a goal at any time.'
Wigan 1 Sunderland 1: Cattermole facing the chop after seeing red againGyan vows to be a hit at Sunderland. after the miss that stunned AfricaGyan relishing Premier League debut as star lives dream with SunderlandSUNDERLAND FC