For JD application, GPA is the second most important factor. For less than excellent GPA, something you might want to know
1. The more you have worked after graduating from college, the less important GPA is because school will look at what you have done after college.
2. Raw score could be disadvantage for lots of international students because getting the same GPA is much harder than in US colleges. But you might want to send the rank of your GPA to the school admission office directly and most of them will consider it.
3.Schools like to see an increasing GPA during your college rather than a declining one. If you have some explanations for your GPA that will help schools understand, you might want to add it as well.
As far as I know, Law schools require more higher GPA than Business schools. My friend just got into HLS as a senior in a Liberal & Arts college this year. He said that GPA is the most important factor in the admission process. Just take a look at the common data of admission offices. The 25%-75% average GPAs are all above 3.5. For top three (YHS), GPA lower than 3.8 will not be considered competitive.