You need to calculate your uwGPA yourself from the letter grades. A/A+ is 4, A- is 3.7, B+ is 3.3, B is 3, B- is 2.7, etc for each class and take the average of all grades you got. wGPA is meaningless outside of your school without details.
Do take the first SAT and/or ACT in the first semester of junior year. Make sure she will prepare for the test(s) thoroughly over the Summer. Try to finish the retake by the end of junior. Then you have some time in the summer to work on the college list and come up with application plan. Avoid retake in senior year as that should be the time finalizing essays and submit applications.