The Reds ranout 2-0 winners.
Gerrard declared: "It went perfectly. We got a good win, had a good test, we got a fitness workout out of it and the supporters were fantastic.
"I need to give a huge thank you to all the Olympiacos team and staff for coming over and giving us a good contest. It was a good test for us."
Gerrard added: "The supporters have always been magnificent with me ever since I made my debut, but to walk out with my three little daughters, who are the most important people to me, was right up there with winning the big trophies for this club. It was a very emotional occasion and I loved every minute of it."