I am not a Data Scientist but interested in the subject and stumbled upon this library. Have not tried or tested it but since it was mentioned that for any serious machine learning you would need access to CUDA for GPU processing I thought this could be of interest to you.
https://github.com/sirin-tech/cuda
The library has not been updated in a while but it seems someone already looked into CUDA bindings for Elixir/Erlang.
