integration from iMIS to Dynamics GP

We are working on the integration from iMIS to Dynamics GP for SHM. I recall back in June we hopped on a call and you pointed out an option from the API that we should be able to extract the debits/credits that the GL Export provides;

Which API should we be using to view a GL Export or is it none of these and a different API that will contain the Debits/Credits/GL Accounts, etc. for any given day/date range?