I have 9 group calendars that I am trying to sync with SP2013. I am unable to get them to sync up with the Outlook calendars. When I try they just sync up with a new "Reports Calendar" on my Outlook and create a new overlay in my Outlook vs. syncing up in SP
I think what you are saying is that;
You have 9 calendars created on Exchange (through Outlook), and you want them to automatically populate within SharePoint, or make the content visible on a SharePoint Page. Out of the box I don't think this is possible. You could export your calendar to excel and import as a list into SharePoint, but this would not make them stay in Sync.
Synchronization is designed to work the other way, you create the calendars on your SharePoint site, and then sync down to outlook, and Outlook will do its send/receive and maintain the data. (basically it's just connecting to the web services of SharePoint to read and write to the calendar, and not storing an Exchange copy of the data although it might be part of the local profile? )
At any rate, you need to create the calendars first on SharePoint (you can also choose to have one calendar, and then create 9 custom views to filter by each object you are tracking, and then sync each of those). Or you can just have the one calendar and sync everything in it.
It is possible to click on an item in your outlook calendar, press Cntrl+C to copy, and then click your newly sync'd sharepoint calendar and press cntrl+v. This is a manual solution, and will not keep the calendars in sync, its only meant to give you a means to migrate the data from the Exchange (Outlook) calendar to the new sharepoint calendars you are going to have to create.
I read there are 3rd party tools that will keep the two calendars in sync. Posted in this thread
Connect/Push Outlook calendar to SharePoint (not vice versa)