Having seen my daughter’s journey (she just completed her 1L year), and based on my experience from 35 years ago, 90% of law school admissions is based on GPA + LSAT. The other 10% is likely allocated to quality of undergraduate school combined with the rigor of your degree, with an additional boost for those applicants who worked or did something particularly meaningful after college and before applying to law school.
And FWIW, I have a communications degree from highly ranked university and attended a top-10 law school.