Budgetary ledger required for new GL?

I understood that using the leading ledger FMGLFLEXT in new G/L  as discussed on this forum could include fields Fund and Grant in new G/L postings (if configured as dimensions and used in FM).

But I see that there is also something called Budgetary Ledger which writes to the G/L.

Is implementation of the Budgetary Ledger also needed to update the new G/L with FM dimensions?

Thanks for your input

E