Redknapp will keep faith with Gomes when Spurs face Blackburn on Sunday at White Hart Lane, then Parks, along with Perry Suckling, will work on rebuilding the confidence of the club's summer signing.
"You need people around here you know," Redknapp said. "The coach from Austria was a top coach but I felt I needed someone who knew the English game really well.
"Tony Parks is a terrific personality, he played for Tottenham and saved the penalty in the UEFA Cup final (in 1984).
"He has worked for the FA for the last seven years. I spoke to (FA football development director) Sir Trevor Brooking about him and he's a fantastic goalkeeper coach. Everyone I spoke to said he was world class.
"It was a change I felt I needed to make."
Redknapp feels Parks can get Gomes to command his defenders with more authority, rather than come out and try to claim every cross.
"He'll be a big help. Tony is a talker - enthusiastic and lively," Redknapp added. "He's just trying to get him confident.
"Guus Hiddink (former PSV Eindhoven coach) talks about Gomes as a world-class goalkeeper, and he (Hiddink) took them to a European Cup final. There is not a goalkeeper in the world who doesn't make mistakes.
"I'm sure he'll come back stronger than ever."