I'm getting old, but at least 15 years ago, law school admission was almost purely LSAT score + College GPA (weighted by perceived difficulty/prestige of College).
Anecdotally, I've found that more prestigious professional schools -- law, medicine -- weight standardized testing higher. The less prestigious, more regionally focused ones, care more about GPA. This is different from undergraduate schools. I've met several people who applied to a large number of professional schools and were only admitted to the top tier. It could be due to the randomness of admissions, but the sample is large enough to convince me.