If you're in high school, you are much to young to even be on this board. Come back in a couple of years when it's closer to the time when it's realistic to being seriously into the nitty-gritty of law school apps.
And your hs gpa doesn't count AT ALL. Perhaps you should be looking into colleges first, and not get ahead of yourself.
The best advice you can use now, is that when you go to college, maintain the best gpa you can, and explore until you find a major that really interests you. And have some fun, too!