File formats of other versions of the llama code

[Rhialto]

I noticed that there are a lot of modified forks of this code around. I'm just starting with this and it's confusing :)
In particular, I tried a model from gpt4all (https://github.com/nomic-ai/gpt4all which curiously has deleted the source but is distributing binaries for a very limited set of operating systems only - and the source which is apparently at https://github.com/zanussbaum/gpt4all.cpp/tree/master ). However, these models seem to use a file format that this llama.cpp doesn't like.
Would it make sense to add support for this other file format? (I don't even know if it is just a small extension, or radically different; but the former seems more likely since the source clearly is derived from this repository).