Can we send Gzip file as SOAP attachment?

Hi All

We have below requirement !!

Need to send flat file from ECC->PI->Third party

ECC place large files but third party has the limitation of 5MB.Chunk option is not supported as merging is not possible at target.

Hence the file need to be compressed as GZIP and send through SOAP as attachment.

I am trying to configure File to SOAP (pass through) scenario. Please guide me how to GZIP and send as attachment to meet this requirement

Please share your views !!

Thanks in advance!!