There are some colleges that use one, or the other, or their own private weighting formula. There are too many colleges to make a list here; College Board has a good college information tool that may help.
Colleges look at both. Keep in mind, however, that an A is an A and a B is a B: just because you received an extra bonus for your B in Honors US History does not mean that you actually got an A in...
Actually they use a mixture of both. Most colleges have their own system of 'grading' your grades. Even if they don't add numerical value to taking AP's and IB's, they do certainly notice them when...
You need to check it out and find out for yourself!! Go to their website!! Also you need other stuff to get into a good college beside just a gpa!! Community service, sports, clubs the lsit goes on!
They will almost always tell you if you look hard enough on the application or call someone at the college.
Most schools want your unweighted GPA, although many will look at both.