For the most part, most BGOs might not be aware of who their candidates are because the system has not been updated. However, if I was your DD, I would take some initiative and find out who the BGO is through the H.S. guidance office and/or calling/emailing admissions.
A good point to bring up now -- not specifically connected to the question asked above...
Candidates, in general, the USNA application is YOURS! It isn't your BGOs, it isn't your parents, etc. YOU are responsible for getting it done. If you want to show your dedication, then you have to take the initiative. DO NOT rely on others to do so on your behalf.