In order to use GHNS for Scripted Effects we need a new category on either kde-look.org or kde-apps.org.
Contacted kde-look today. Waiting on their reply.
This bug should be resolved shortly. See https://bugs.kde.org/show_bug.cgi?id=297637 for history.
Category has been created: http://kde-look.org/index.php?xcontentmode=90