Do colleges look at senior year grades (GPA)?

When applying for colleges, is the UW GPA just nineth, tenth and eleventh grade? Or does it include the first three years along with early senior year grades?

You normally submit mid year grades in January for RD applications and if you apply early schools will request data on your first “quarter” or grading period

Some colleges (like public universities with rolling admissions) will admit you based on 9-11 grades only, but they will require you to submit your senior year grades after graduation. If they are significantly different than your track record of grades 9-11, then the university might withdraw the offer of admission.

They also want your final transcript when you matriculate. Bad grades may lead to rescind admission sometimes