Where are you stuck?
Anyway,
here's[
^] some example code how you bind a stored procedure to a gridview.
You would need to install an oracle client and change the connection, connectionstring , command and namespaces accordingly.
The CommandText would in your case be:
cmd.CommandText = "GSI_GIC.PK_GSIMSGDATA.GSIMSG_Data";
This should be enough to get you started, come back when you have specific problems.