Installation of SAP Gateway 
On your front-end server, some components have to be available as part of your SAP Gateway installation:
If you run SAP NetWeaver 7.31 SPS 05 or higher (recommended minimum SPS 08) on your front-end server, you have to install the listed components.
If you run SAP NetWeaver 7.40 SPS 07 or higher on your front-end server, the listed components are automatically installed with your SAP NetWeaver installation. Verify that they are in place.
You can download the product versions containing the SAP Gateway components from SAP Service Marketplace. For more information, see Downloading and Installing Product Versions.
Required SAP Gateway Components
You can find details on the installation of SAP Gateway for SAP NetWeaver 7.31 in the documentation for SAP NetWeaver Gateway 2.0 SPS 09 on SAP Help Portal at 
http://help.sap.com/nwgateway20 
Installation and Upgrade Information Installation Guide SAP NetWeaver Gateway Installation Guide 
.
For more information about SAP Gateway components for SAP NetWeaver 7.40, see SAP Help Portal at http://help.sap.com/nw74 Application Help Function-Oriented View SAP Gateway Foundation (SAP_GWFND) SAP Gateway Foundation Master Guide Deployment Options .
SAP EhP3 for SAP NetWeaver 7.0
If you run EhP 3 for SAP NetWeaver 7.0 on your front-end server, install the following components of SAP Gateway 2.0:
SAP Gateway Product Instance | Comprised Component Versions | Support Package |
|---|---|---|
Gateway Server Core NW 703/731 | GW_CORE 200 (GW_Core 200) SAP IW FND 250 (IW_FND 250) SAP WEB UIF 7.31 (WEBCUIF 731) | SP09 SP09 SP09 |
Only for the Approve Requests app: Gateway PGW | SAP IW PGW 100 (IW_PGW 100) SAP IW BEP 200 (IW_BEP 200) | SP06 SP09 |
SAP EhP4 for SAP NetWeaver 7.0
If you run EhP 4 for SAP NetWeaver 7.0 on your front-end server, install the following components of SAP Gateway 2.0:
SAP Gateway Product Instance | Comprised Component Versions | Support Package |
|---|---|---|
As of SAP NetWeaver 7.4, the components GW_CORE, IW_FND and IW_BEP are replaced by a new software component for the SAP Gateway foundation, SAP_GWFND. This component is included in the SAP NetWeaver installation. | SAP NW GATEWAY FOUNDATION (SAP_GWFND) | SP08 |
Only for the Approve Requests app: Install Gateway PGW NW 740. | SAP IW PGW 100 (IW_PGW 100) | SP06 |