Hi,
GLOO does have an ibverbs transport https://github.com/facebookincubator/gloo/tree/master/gloo/transport/ibverbs 7. However, it was never used or tested with PyTorch. That may be the reason that PyTorch doc says GLOO does not support infiniband.
We are about to test GLOO ibverbs transport over RDMA, and integrate with PyTorch on HPC scenarios. For now, GLOO ibverbs hasn’t been integrated to PyTorch yet.