GT allows frosh one free change of major before 60 credits, so they do not have to compete to get into CS: https://advising.gatech.edu/change-major-glance . The GT CS web pages do not mention a college GPA needed to stay in the major, although a minimum GPA is needed to avoid academic warning, probation, or dismissal from the school (1.7/1.8/1.95/2.0 for frosh/soph/junior/senior according to https://www.cc.gatech.edu/academics/college-advising ).
I.e. there does not appear to be active weeding, even though the courses and curricula may be difficult.