Hello Bharat,
You may create 2 output types for 1 PO.
Suggestion is to create those output type (output type X-for partner function GS, output type Y-partner function Freight forwarder).
To generate 2 output types in PO, please ensure in the access sequence, not to tick the exclusive indicators.
http://help.sap.com/saphelp_scm41/helpdata/en/ca/ac7937b566ab49e10000009b38f842/content.htm
Hope it works.
Regards,