bonded warehouse GTS

Hello,

1) How are Bonded Warehouse configured in ERP and interfaced to GTS10.1?

2) Is SAP EWM required for Bonded Warehouses and can you use SAP ECC 6.0?

We would like to implemented a Bonded Warehouse using ECC 6.0. Some of the discussions found in SDN mention SAP EWM. But is this really required to implement a Bonded Warehouse, especially with interfacing the master and transaction data to GTS 10.1?

Thank you in advance.

Anu