Do you have to transfer all college grades if another is lowering your grade point average?

No, you do not have to transfer all college grades if another is lowering your GPA. When transferring credits from one institution to another, it is up to the receiving institution to decide which credits to accept and how they will be applied towards your degree. Some institutions may choose to only accept credits that are above a certain grade threshold, while others may accept all credits regardless of the grade. It is important to check with the admissions office of the institution you are transferring to to determine their specific policies and procedures.