Deco, making his first appearance in the South American equivalent of the Champions League, also set up the equaliser as the Brazilian champions twice came from behind in the Group Three game on Wednesday.
"I feel alive again," the former Barcelona, Porto and Chelsea player told reporters. "Those two months took away my happiness. They were two very difficult months.
"To do what I enjoy again makes me very happy... It was one of the most important goals of my life, because of what I've been through."
Fluminense's win in Rio de Janeiro pulled them right back into contention and kept the group wide open with two games each to play.
Argentinos Juniors lead with seven points followed by America (6), Fluminense (5) and Uruguay's Nacional (4).
Uruguayan striker Vicente Sanchez headed America in front in the 14th minute and Gum levelled for 'Flu' six minutes later.
After four games each, Godoy Cruz have seven points, one more than Uruguayans Penarol and Ecuador's LDU while Independiente trail with four.
