To reconcile to GL as of a specific date:

Run the Aging Detail by Customer with a condition of:

Cash Receipt Type Equal To Customer Cash Receipt.

This report will show customers with a customer cash receipt balance as of the Aging As of Date. To see all customer cash receipts use a future date (it will only show customer cash receipts that have not been applied).

This report balance should equal the customer cash receipt account balance (find the Account in AR settings, GL Settings, Balance Sheet Accounts).