Hi Pradeep,
can you provide more information? What error are you getting? I guess you are installing SAP Gateway for Microsoft VIsual Studio add-in. Which version? The Developer Trial or the "real" version?
Which specific version of VS2013 are you installing? Community Edition?
Please make sure that you have installed the following pre-requisites:
1) Download and Install Visual Studio 2010 Tools for Office Runtime
2) Install OfficeToolsForVS2013Update
For more information on VS2013 and latest updates Please refer : http://www.visualstudio.com/news/vs2013-update4-rtm-vs#Office
Regards,
Holger.