Why not. It's better to fix your gpa now than later on.
I regret graduating before taking extra science classes.
Now I have to apply again as a non-seeking student and I won't even get the same loans or the same financial aid I could have gotten before graduation.
Also, when you gradate you can't register to classes early, so that is another bad point here.
I am trying to take more bio classes as my education wasn't focused on bio. Some of the classes are already closed.
My school is mostly pre-health students so anatomy and physiology courses are always closed after they open in a week or so.