I think you can find footstep sound mods that do that pretty well actually. there is no simple built in implementation for GZDoom to add footstep sounds so that's why i have left alone, it would probably require a custom player actor or zscript which i have very little experience with and may cause game mod comparability issues.
ProjectRemap
joined
What Started off as a simple GZDoom map pack project, has now turned into a research and development quest for a better end result.