Pietersen said Gayle's presence would add more entertainment to the three-Test series which England lead 1-0 after winning the lord's Test by five wickets.
"It will be brilliant for the game if he comes back to play this Test match. He is an entertainer. People want to watch entertainers," said Pietersen.
"They don't want to watch people blocking the ball. They want to watch entertainers. He is one of those that people will pay their money to watch him play, and if he comes back that could be brilliant for the series."
"He is a superstar and he is one of my real good mates in cricket. I love the way he plays," Pietersen added.
Gayle, who played his last international match against Pakistan during the World Cup due to a dispute with the Windies cricket board, opted out of the Test series against England due to his Indian Premier League stint with Royal Challengers Bangalore.
RCB were knocked out of the cash-rich league on Sunday, however, raising speculation of a call-up for the Jamaican giant.
Gayle played his last Test in December. The former West Indies skipper has scored over 6000 runs in 91 Tests at an average of 41.