I personally didn’t see the benefit in a gap year; coming out of high school, I had a pretty empty resume with nothing to show but a decent GPA and a high school diploma so I doubt I would’ve been qualified (professionally or otherwise) for some the more interesting gap year opportunities available.
Now as I approach the half-way mark in my undergraduate education, I am definitely considering gap year(s) between undergrad and professional school; as I procure more experience in my field of study through volunteering, internships, and employment, I think I’ll be better able to pursue some sort of opportunity relevant to my interests and career goals.