Hi hpmhpm94,
There are a few potential drawbacks to your plan:
1) It's possible that you might want/need this GMAT Score for something other than applying to this one School (you might want to apply to another Program at some point in the next 5 years - but if this Score is 'incomplete', then you would have to restudy and retake the Exam - costing you a lot of additional time, money and effort). Some employers actually ask for an applicant's GMAT Score as well - and you would not have a full Score under these circumstances.
2) If the Representatives at the School that you plan to apply to "change their minds" (or some policy change occurs), then this partial Score might not actually get you in.
3) Your proposed idea (to take the Quant section seriously and either skip or rush through the other sections) might be seen as a 'test violation.' In the past, groups of Test Takers were taking the Exam with the goal of memorizing the questions - and then selling that information to other Test Takers. That plot was uncovered and led to a number of consequences (banned Test Takers, voided Scores, some offenders actually got kicked out of School, etc.). As a result, any type of suspicious activity - such as the one you are describing - will come under greater scrutiny. If you proceed with this plan, you might not actually receive a Score at all - but you'll still be charged for the Exam (and you might be banned from reattempting the Test).
This is all meant to say that your idea carries a LOT of risk - and very little upside. Take the FULL GMAT and take it all seriously. You don't have to study for every section, but you plan to do your best on each section on Test Day.
1) When are you planning to take the GMAT?
2) What deadline(s) are you facing?
GMAT assassins aren't born, they're made,
Rich