Depends on the university. Having a relatively lower GPA may remove you from the short list for some schools, but having a a high GMAT score, combined with work experience, and if you can demonstrate some activity on the research front should get you good look overs in a lot of others. Don't stress about the undergrad GPA. Look at it this way... If you believe you have something to offer and these schools fail to even take you into consideration because of a GPA that's not close to 'perfect' ... is this even the right environment for you anyway? Food for thought.
Best of luck.