I missed this feature and its a really nice one.
Microsoft Dynamics GP 2015 R2 New Features – Auto Deposit Cash Receipts In Bank Rec
Microsoft Dynamics GP 2015 R2 New Features – Auto Deposit Cash Receipts In Bank Rec – Microsoft Dynamics GP Community
Tips & Hidden FeaturesGeneral Ledger & FinancialsPayables & ReceivablesGP 2015
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.