I just looked at the GPA guide by AMCAS and I am just wondering if the courses taken while in high school are going to be counted toward "cumulative undergraduate GPA." Does anyone know about this? Thank!
Were you dual-enrolled, and do you have a college transcript for that coursework? If so, then yes, those grades will be counted toward your cum UG GPA. You are required to submit all post-secondary transcripts to AMCAS, which means anything taken above the high school level. All post-secondary grades will be used in the AMCAS calculation. So yes, that includes any grades for courses taken where you were dual-enrolled in college while you were in high school.
As others have already said, though, this is not nearly as big of a deal as you're making it out to be. I know you're anxious because you're applying and it seems like everyone else on SDN has a 4.329 GPA, but try to chill a little bit. First, the C in this class isn't going to matter nearly as much as your MCAT score is going to matter. So focus on studying for the MCAT. Second, med schools are not looking for perfection. It's ok to not be perfect. Really, it is.
Also, a little other friendly advice: don't blame your Cs in high school on anyone else. Even if you're sure it's all your teacher's fault (or your school's fault, or the language barrier's fault, or the alignment of the planets' fault), part of being mature is accepting that you are responsible for creating your own success in life. You are not just some passive, inanimate object that things "happen to." So if interviewers ask you why you got Cs in high school, then tell them the truth: you weren't mature enough in high school to be taking a college level class that required you to learn independently. There's no shame in that. Plenty of college underclassmen aren't mature enough for independent learning, never mind a high school senior.
Again, having a sense of perspective here is key. People change over time, and adcoms recognize this. You went to college and kicked butt the whole time, so obviously you're not the same guy or gal academically that you were four years ago. Right?
Best of luck with your apps.
🙂