GN Specular to Metalness

This node is designed to quicky convert a material using the Diffuse/Specular/Glossiness PBR model to the BaseColor/Metallic/Roughness one directly in Substance Painter/Designer or with Substance Player.
This node offers many different options that will help you tweak exactly which part should be metallic and which part should be dielectric, as well as some options to adjust its general behavior.

Available for free on my ArtStation store:
https://gabrielnadeau.com/store/1xoo/substance-gn-specular-to-metalness