I will be a senior during the 2020-2021 school year and currently my GPA ranks me in the top 7% of my class which is just off of automatic admission to my goal school. If the grades I made during the fall semester of next year bumped my GPA up enough to be in the top 6% would this GPA be considered during college admissions or the GPA from the end of this past school year?
If you're talking about the school I think you're talking about (UT-Austin's guaranteed admit program), then I don't think so — under the rules for that program, you need to fulfill the conditions for auto-admission by the end of junior year. You can find those rules here: https://texreg.sos.state.tx.us/public/readtac$ext.TacPage?sl=R&app=9&p_dir=&p_rloc=&p_tloc=&p_ploc=&pg=1&p_tac=&ti=19&pt=1&ch=5&rl=5
Though I would also talk to their admissions office directly and ask, because they'd be able to tell you in no uncertain terms.
For the regular admissions process at most schools, they will look at your senior fall grades. But for specific schools, you should always double check.
Although many people have said that junior year is the most important, colleges will definitely look at your senior year grades. Since you are so highly ranked in your class already, admissions officers are going to want to see you maintaining those good grades. Good luck :)
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