Biomedical engineering seems to be popular among pre-meds due to overlap between major courses and pre-med courses (other kinds of engineering may not have enough free electives to fit in courses like organic chemistry, biology, and biochemistry), but biomedical engineering tends to have weaker bachelor’s degree level job prospects than many other kinds of engineering.
Also, the heavily prescribed curriculum of most engineering majors tend to allow for fewer elective opportunities that can be used for GPA boosting.