Gerrard tied the score with 19 minutes remaining after Lee Carsley was harshly ruled to have brought down young Frenchman David Ngog by referee Peter Walton.
Carsley's reaction? "It's a joke. I know for a fact I didn't touch him," he told ESPN. "I think when the referee sees it, he'll be really disappointed."
The draw leaves the Reds 11 points behind leader Chelsea.