The 33-year-old scored his 100th league goal from the penalty spot three minutes before the break as the Reds twice came from behind to claim a point in a 2-2 draw with the 10-man Magpies.
Rodgers later saluted Gerrard, who led his country to qualification for the World Cup finals in Brazil during the international break, and predicted there is still more to come.
He said: "It's a monumental contribution. I have watched him play for many years as a young player and probably for me, his best Premier League goal came at this ground when he played against Newcastle.
"He scored an absolute screamer here from a free-kick. But he's an incredible player and I am fortunate enough that I get to know him as a man as well.
"As a captain, he has been brilliant for me. He understands the manager's role and respects it.
"He is a great player who has got many more goals to come as well. You see his fitness level - people talk about him and his fitness and how is he at 33?
"Well, he's played two really tough international games, played at a high level and he has also got a really good performance in today, so he is still fresh and looking very, very good."
- Sports & Recreation
- Luis Suarez
- Yohan Cabaye
- Daniel Sturridge
- Paul Dummett