Did you check the below blog?
Undocumented Feature: Gzip/Gunzip using standard SAP PayloadZipBean module
Though it is undocumented seems like it's working..
In case you don't want to go with that..you can check the below module..
Module PayloadGZipBean: Zip and Unzip Payloads using gzip
Message was edited by: Hareesh Gampa