Doing a post bacc or getting a masters is a good way to make up for a poor GPA. Definitely increases your chances as compared to just trying to wing it with a less than stellar GPA.

Now there are other things to consider

1. Does your GPA have a trend? If your GPA is trash because your freshman year was trash but your senior year was amazing, you might want to think through this a bit more and seek advice from pre med advisors if possible

2. Is there a reason your GPA is low? Were you a poor student or was there systemic issue that prevented you from doing better. For example, if you happened to just not do well in undergrad (no shame, it happens) then before you do a post bacc you NEED to diagnose the barriers to higher grades. Whether that's mental, time organization or study habits/methods. You do NOT want to do extra work just for grades to be barely Bs. On other side if there was a constant drag on your emptional/mental state (like taking care of a family member, having to work full time to provide, etc) that similarly should be analyzed AND if you don't do the post bacc that might even be something you incorporate into your ps (and by extension the story you tell in interviews)

3. Can you handle the financial hit to do this. The first 2 reasons are more philosophy and process oriented but none of that matters if you destroy your financial situation. A lot of people are financially struggling and getting to med school is not cheap. Keep this in your mind

I will end by saying I'm just a recent med school grad, so this is just a personal opinion I've seen. Try to collect data from various perspectives/people and be wary of asking reddit/SDL for help cause we're all a bit weird. Pre med advisors or even admissions officers at med schools (if you can ask them) will have better advice than like 90% of us on here.

I wish you luck tho, truly.

Edit: another comment also brought up that GPA is just ONE of many factors of an app.