Eisot Unfortunately, the only tag that can be used with GimpToSpine is the [ignore] tag, and other tags that can be used with PhotoshopToSpine are not available.
Actually, most of the scripts in the spine-scripts repository are based on user contributed scripts, and GimpToSpine is one of them. It is difficult to update the script for Gimp because no one on the Spine team is familiar with the scripts for Gimp. So currently only PhotoshopToSpine is updated relatively often.
