How does Harvard admissions view HES students?

I'm curious about this.

The reason I want to attend HES, is because I feel it will enhance my college resume instead of pursuing med school with my B.S undergrad alone. Have 3.9 GPA.

I would be curious to know if there are Harvard Phd or Med students that were accepted into their program by going the HES route.

Coming from someone such as myself that chose to pursue a different career a little later in life, will having HES on your record make a big or small difference? Not just with Harvard but other Ivy League schools as well.

Edit: I'm only asking because I would like to know if it is worth it to attend HES if you already have a good GPA, because I can take those classes anywhere.