Hello, No there is none, though I'll probably add one to [Arraymancer](https://github.com/mratsim/Arraymancer) at one point.
Depending on how familiar you are with C++, it might be easier to wrap [XGBoost](https://github.com/dmlc/xgboost) or [LightGBM](https://github.com/Microsoft/LightGBM) or ask someone to wrap them using [nimterop](https://github.com/nimterop/nimterop). I don't think there is any case where random forest offers better accuracy and convergence speed compared gradient boosted trees.
