I would have to partially disagree. GPA-padding can definitely be helpful to a degree, but "top 5" schools all look beyond the GPA. You still need the GPA, but a GPA built on basket-weaving will not do well when the other applicants have the same GPA and a chem/bio dual major.But to go to any of those schools you absolutely must do extraordinarily well on the LSAT. Your LSAT score is far more important than your choice of undergraduate school.
I really doubt it, but the best person to ask would the admissions office at the law schools you want to apply to. There job is to literally answer questions like this so shoot him an e-mail or give them a call.