what is the GPA that most colleges require for admission?

Answer 1

If you go to the college board's site they have a "college finder" section that allows you to search for colleges that match your interest. For most of the colleges it lists the GPAs of the students who were admitted there. How many had 3.5's, how many had 3.0's etc.

It also tells what majors they have, what the tuition is, and how many men and women are in the school.

Way more information and much more reliable information than you can get here.

Answer 2

Each academic institution has a different requirement.

Some local community colleges do not have a GPA requirement (example: only need a diploma or equivalent), whereas some Ivy League universities admit students with a 3.5 GPA or better (example: graduated at top 10% of your class). Also, quite a few universities look at your college entrance exam scores (like ACT or SAT) instead of or in conjunction with the GPA. It all depends on how good a school you’re trying to get into.

You must really visit the individual college's website and review its Admission Requirements section. Academic requirements will always be spelled out there.