Angelos Postecoglou's side were unable to reach the knockout stages of the competition this summer, but they did impress in their draw with Chile.
Australia were narrowly beaten 3-2 by eventual winners Germany but Gombau believes their performances have shown the potential within the team.
Gombau is currently helping Postecoglou prepare for the team's World Cup qualifiers, with fixtures against Japan and Thailand set to decide their fate.
The Aussies are third in their qualifying group and just one point behind group-leaders Japan and Gombau is adamant the Socceroos are in a strong position.
He told: "I think we are in a good way. At the Confederations Cup, the team was amazing – we went from less to more in every single game.
"Against Chile, we did very well against one of the best teams in the world. I'm sure if we play with that intensity and mentality, we don't need to fear anyone.
"These two games can be a very good test for us. We need to keep the same mentality that we had against Chile.
"Hopefully in Melbourne against Thailand we can qualify automatically as one of the sides that goes to the World Cup next year."