A 2.5 GPA significantly lowers your chances of admission to UNC-Chapel Hill. UNC-Chapel Hill is a highly selective university, and while they consider a holistic application, a GPA that low makes acceptance very unlikely. They generally admit students with considerably higher GPAs. While other factors like strong test scores (if required), compelling essays, and exceptional extracurricular activities can help, a 2.5 GPA is a substantial hurdle to overcome.
Focus on improving your GPA if you're still in high school or consider other universities that might be a better fit for your academic profile.