Gain the knowledge is not a correct sentence in English.
If you want to use it in written English, you would need to reword it to make it grammatically correct. For example, you could say: "He is determined to gain more knowledge."
A well-meaning colleague tried to console me, but I was pleased to gain the knowledge.
Right now I'm looking to gain the knowledge and also build the clientele.
The college says it has helped 784 women in 80 countries gain the knowledge to become solar engineers, teachers and clean energy advocates.
Working with Lastman, who was well known at that time as a history painter, must have helped Rembrandt gain the knowledge and skill necessary to master that genre.
And when he finally left Roseland, for Harvard Law School and a political career, he did so, he said, to gain the knowledge and the resources that would allow him to eventually return and tackle the neighborhood's problems anew.
"We want to give every family the choice of a good local school, where their child can gain the knowledge and skills they need to succeed in life in modern Britain.
According to some rationalists, we gained the knowledge in an earlier existence.
They have gained the knowledge and valuable experimental competencies besides becoming more aware of the need to sustain the environment.
Of course, gaining the knowledge and skills to land a good job is important and valuable for the individual and for our society.
The findings show that the nurses had gained the knowledge and technical skills to provide appropriate ANC services.
But there was no existing training for volunteers to gain the essential knowledge and skills.
