Gomes has made several poor performances for City this season.
“He did all right against Manchester City [at the weekend],” said Redknapp.
“He has just got to settle in and understand what is required in England.
“When you talk to people about him, they talk highly of his qualities. Tony Adams did when he returned from Holland.
“Gomes took PSV to the semi-finals of the Champions League almost single-handedly, by all accounts.
“He was that good. It is a game of confidence and he has had one or two iffy days. Hopefully now his confidence will start to grow and we will see what he can do.”