600? I am thinking 730 because the GPA is too low. Which school is your undergrad? If U of T, McGill, Waterloo, Queens, Alberta, maybe GMAT 700, if Ryerson, Brock. Windsor Maybe GMAT 730.
PS. ask the admission office of Queen and York, they can answer it better. Just ask them where can you improve your Candidacy, they may say go work for 2 more years then apply.
That sounds about right but the higher the better. I didn't apply Queens or Schulich so I don't know the student profile well enough. but FYI I have 3.5 GPA, Engineering+Honors Finance. I still took it 5 times to get >750 so why not try to get it as high as possible?