The GP Processes you have developed need to be presented to the end user as a portal content. Let's see how it can be done in a few simple steps.
First create an iView in Portal Content of type Java Web Dynpro and use the following Web Dynpro application provided by SAP: AInstantiation under namespace sap.com/caf~eu~gp~ui~inst.
In the Application Parameter property of the iView specify the process id of the GP process in the parameter process.template.id e.g. process.template.id=A7A896EFADF811DBC0640016353AC84F&process.autostart=t
You can also set the process.autostart=t if you want to start the process without asking the parameters and role assignment from the initiator. You can get the GP process id from the Instantiation tab of the GP process design time.
Now you can attach the iView to a workset or page and attach that to a role to be displayed to the user. When the user clicks on the link of the iView the process will start. For the processor of the subsequent actions the link may automatically appear in their UWL if you have configured the UWL according to the following document/weblog: How to Configure UWL with the GP Engine or Guided Procedures: Runtime in Universal Worklist Alternatively work item notifications can also be sent to the processors' as mails. Please refer the following weblog for this : How to get Work items @ your Outlook Inbox