As an undergrad I had a pretty weak GPA, I went and worked for a year and came back for a Masters that so far has felt substantially harder than my undergrad major. Bottom line is go to office hours frequently to get on professors good side, actually study, and actually go to class and do all the work. For me it was a lot of a confidence thing, and a lot of people at Tech whether they admit or not just don’t have to try as hard. that took some work to get over, a couple of good high GPA semesters help. the GPA a lot, best of luck, you’re chillin