Support for Drupal 7 is ending on 5 January 2025—it’s time to migrate to Drupal 10! Learn about the many benefits of Drupal 10 and find migration tools in our resource center.
There is a module that migrates from SPIP to Drupal 6.x. It is currently (April 2010) in active development.
It provides a plugin for spip so it depends on versions above 1.8 (I think) that introduced a interface for plugins.