I've worked this morning on your filter code, to make it a bit shorter / cleaner and to allow the processing of multiple input layers when necessary.
The filters are now available for all G'MIC users (v.3.3.4+), after pressing the "Filter Update" button.

Click image for larger version. 

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If you want me to add credits or put a link to your page, please let me know.
Your filters are pretty cool, thanks again!