Reply To: Sephardim, Marriage, Gittin, and Cherem Rabbeinu Gershom

I believe that there is no text of the cherem as it was not instituted all at once (just kind of over time, these are famous decrees he made, etc). Even if there was, there is no reason to believe that it would survive, as this was written 500 years before the printing press and there would be no reason for them to copy it like the gemara or Rashi or anything like that.