Suggestions please

Hi, i wanted to get some suggestions about things to do outside of school to further help me with my goals in the Computer science carreer path. Im trying to hopefully go to Ga tech since its a great school for STEM and its in my state. I really like computer science and i wanna do something to spice things up(lol) on my resume. Something that can look interestig to me and the colleges.
Thanks

What year are you? What are your standardized test scores, GPA, and rigor of high school courses? (If those are not sufficient, then your ECs are probably irrelevant.)

What ECs have you been involved with to date? Leadership positions?