Can I get into Harvard Business School?

HBS doesn't take anyone straight out of undergrad; you would need to get at least five years of post-college work experience before applying. At that point, you would need to take the GMAT (your SAT and ACT scores won't count toward graduate school), and they would look at a whole new set of information, including your application essay, work experience, etc. No one cares if you are good-looking or charismatic - in fact, you may turn a lot of people off by presenting yourself that way! At this point, your GPA from a good school like McGill would mean that you could be a potential candidate eventually, but not yet, and there is never any certainty about schools at this level.