If your student is less interested in needing a lot of core classes, look into colleges like Brown, U Rochester, and a few others that allow students to take whatever interests them alongside their major (what they get their actual degree in).
I’m not sure having a high GPA is tougher with multiple majors as long as they’re courses the student enjoys. Studying is less of a chore when you’re fascinated with the subject. Getting grades in classes you don’t really care for, but must take, would be more work for me. This is why it’s suggested for pre-meds to major in something they like - not something they simply feel would be impressive to admissions. Medical school teaches everything a doctor needs to know.
U Rochester (undergrad) also has a Take 5 option where a student can apply for a 5th year tuition free if they study something totally irrelevant to their major - just for the enjoyment of the study. It’s competitive to get, but my guy took advantage of it and loved it, studying something to the effect of “Western Influence on ‘Success’ in Africa.” That’s not the exact title, but gets the gist across. Room & Board aren’t included for free, but he was also an RA (Resident Advisor in a dorm) so his room was free. It was an inexpensive year for a lot of academic fun for him. I don’t know that such a thing helps med school apps either, but it certainly didn’t hurt him.
To get into med school a student needs high academics/MCAT, a lot of volunteering and shadowing to show they know what the job really is, then they need to be themselves actively doing what truly interests them. Mine had the top academics/MCAT to be in the top grouping here (same link @ucbalumnus gave before):
https://www.aamc.org/media/6091/download?attachment
volunteering/shadowing, research, a couple of overseas medical missions trips (Cote D’Ivoire and Philippines), on campus jobs from freshman year, was an RA for 3 years, TA for a few classes, president and active in ASL, dance, juggling, + religious clubs, and a good enough juggler to make it onto his U’s advertisements juggling fire. (This was mentioned in UR’s medical school profile for his year, so they took note of it.)
What we’re not sure about is if he ever slept.
But no one needs to copy him exactly. Others on here who have kids currently in or went through med school would have done other equally as interesting and challenging things. My guy loved everything he did. The only thing he specifically did “just” for med school was the MCAT. He’d have done all the rest even if he didn’t go the medical route. Until he actually applied he was considering research too. Research was his Plan B. Now he’s 100% sure he chose the right path for him. He loves being a doctor.