The fullback scored his first goal at Anfield in victory over Swansea City.
"It's always special if a player comes from the Academy to the first team," said Holland international Wijnaldum.
"In his case, he was also a Liverpool supporter, so everyone wants him to do [well], and us as a team because he is a good guy. [He's] always trying to learn and get better, so we were all happy that he scored a goal.
"It went well, we created more chances and scored more goals."