Zungu has played 29 times for Bafana Bafana and impressed at last year's African Cup of Nations.
"Bongani fits the profile of player that adds further strength and depth to our midfield. We made it clear that we wanted a player who will enhance our squad and starting XI. We believe Bongani does this," Rangers manager Steven Gerrard said. "We wanted a dominant midfielder with the right profile who can enhance the team and complement other players we have. We have monitored this situation all summer and now feel it's the right time.Now Liverpool fan Zungu is looking forward to learning from his boyhood Anfield hero Gerrard.
"I have studied the squad and feel I can come in and bring my attributes to help the team improve," Zungu said."I can't wait to fly to Scotland and meet my new teammates. I know that I will settle in Glasgow and am looking forward to getting started as soon as possible. "Rangers is a global club and I know there are already many supporters across Africa. I am looking forward to playing in front of a big crowd and audiences across the world."
He's a great player, he'll shine Scottish premiership...