Would I have to list my gpa from all colleges I attended???

A four year college isn’t for me. None of my course grades to a community college where I will get certified in another field will transfer. The pre reqs that I will take to enter the program are not related to the classes I took at the 4 yr college. Would I have to list my gpa on a resume? Or should I just not list my gpa at all? Keep in mind this is not transferring the courses from a four year to a cc for an associate degrees so all my gen eds wont transfer at all. It’s for a certification so they only look at if you have taken general math/reading courses to test out of a placement test (I took these courses at the 4 yr so I will test out) and if you have taken pre reqs and I took a science course at the 4 yr that was a pre requisite for a pre req for this program. so will maybe employers look at the 2 science courses I took but got a C be those are the only courses that have to do anything with the certification program courses? Will that affect me? Could I just explain that I wasn’t in the right major at the 4 yr but got great grades in the community college program?

You have to report all grades from all colleges. Each college will calculate a different GPA based on the courses taken there. If you are not sure about your GPA, then just list all courses with the corresponding grades.

If you are applying for a job, it is not required to list your college GPA. Employers may ask however.