[REQUEST] GPU utilization in the process list

[siltyy]

Is your feature request related to a problem? Please describe.
it'd be nice to not additionally have nvtop open for GPU utilization monitoring now that btop has some level of support for this, but it's important to be able to view each process's in-use graphics device and the resources being used on it.

Describe the solution you'd like
several extra columns in the process list to display a process's GPU device number, percent utilization, and VRAM usage. in the interest of not bothering users who don't care about such info, the columns should probably be togglable as to not waste screen space. the ability to sort by these values would also be desirable.
unsure of how welcome this would be, but if the GPU-related columns were positioned to the right of the Command column, they could be overlapped by the process cmdline when not populated (as would be the case for the vast majority of processes). spreadsheet software commonly does this and i don't find it to impede readability.

Describe alternatives you've considered
toggling off btop's GPU box and keeping nvtop open in another window.

Additional context
example of nvtop's process list