Hi,
You don't have SAP provided BI content data source for your requirement.
You need to generate your "Generated DataSource for General Ledger".
SAP Library - General Ledger Accounting (New)
use Transaction :
FAGLBW01: Tcode to Generate Extraction Structre for General Ledger
FAGLBW03 Tcode to Asign DataSource toa General Ledger
Search for more info on SCN or google.
Regards
KP