My take...it depends.
(1) If you are a rising senior, at this point, it doesn't really matter....what if your BGO says you aren't competitive...are you not going to apply? There is very little that you can change at this point beyond doing well in the fall semester (in case the Admissions Board wants to see first semester grades) and on the SAT/ACT. Most things in your application have been solidified...your transcript is what it is (at least for initial Admissions Board review)...hard to start a new sport or ECA(s) at this point, which would significantly impact your application package. I am not saying you shouldn't contact your BGO if you have questions, but keep this in mind. If you believe your course grades are not "up to par" at this point, that is what the Admissions Board is going to see on their first review...if they defer a decision, they might inquire into your first semester grades (which is another reason why you want to put forth your best effort).
(2) If any other class (rising juniors and below)...the question is more "appropriate" (in the sense that there is more time to make changes) because your BGO can help you with recommendations on how to become more competitive.
Lastly, BGOs only see your SAT/ACT scores and WHEN you submit application documents...we have NO idea on what your application "looks" like to Admissions. This includes the decisions on sending candidates to NAPS/Foundation. Hypothetically, two candidates could have identical stats from nearby areas and have two different outcomes...so even if a BGO gives you an idea...the weight should be just slightly more than a grain of salt.