You cannot do much about your GPA now. But, the general rule is if you have a low GPA, it can be compensated with a high GMAT score. If you are targeting top consulting firms, aim for high GMAT score. It definitely helps!
All the top consulting firms generally look for good academic achievements (dean's list, top scholarships, etc). All these can only help you to get to the interview stage. Your performance in the case interviews will determine whether you get in or not. Good luck!
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