Telling the Camera to "see" Chroma Key Green as White

[Emporium]

I am new to magic lantern and am wondering whether this outcome will be possible.

I am using the chromatte ring light system where the background is grey but the camera sees it as chroma key green. I am wondering if I can use Magic Lantern to make the camera see anything that is chrome key green as, instead, being pure white? This is for a product photography setup where we are trying to get white backgrounds very quickly without any editing in post.

Has anyone ever done something like this?