Compatibility SAP Gateway (Netweaver 7.4) and SAP Business Suite (Netweaver 7.0)

Hello,

we are planning to install SAP Gateway on SAP Netweaver 7.4 SP10 as a Central Hub Deployment, and the development will be in SAP Business Suite Backend System. We have 2 backend systems with same SAP Netweaver 7.0 SP28 (SAPKB70028) and ECC 6.0 SP23.

The questions:

1. Will we have any problem with these combinations?.
2. What SP of Gateway component IW_BEP is compatible with SAP Netweaver backend systems? or Can we install IW_BEP SP10 on backend systems?.

Thanks,

Angel