Extend Standard Gateway Service

Hi Gurus,

I am novice in SAP Netweaver Gateway and would like your assistance in this regard.

There is a requirement where I need to extend a Gateway service to add additional parameters.

I have read documentation where Gateway Service can be enhanced by redefining it as custom but in this case the external service name changes to a new name which is not desired. For example

Sp, IS there a way where we can extend the gateway service ( by adding additional parameters) and yet the external service name remains same i.e PAOC_TRAVEL ?

Any help would be much appreciated.

Thanks