Yep, if he doesn’t do a good job in the humanities or other required classes, his gpa will suffer. My daughter the engineer had to work twice as hard in the required English and social science classes, but she did it. My daughter the history major has to pass a math class and 2 science classes. They are very hard for her.
He needs to start taking the required courses, one or two at a time. Or in the summer at a community college.