Bosnich, in his first game in over five years, kept a clean sheet and saved a 71st minute penalty from Steve Corica to cap a stunning comeback.
"One swallow doesnât make the summer and there's still a long way to go," said Bosnich after the match.
"If today went another way, I would still say the same thing, it was a really good start, the most important thing is that the team won.
"It was a pleasure to play and Iâm very thankful to everybody."