pandas.read_pickle can take buffer object as well, not only str
https://github.com/pandas-dev/pandas/blob/62a87bf4a2af02a8d3bc271ad26e5994292b8e6a/pandas/io/pickle.py#L95

read_pickle does not accept google storage URL (in form "gs://bucket-name/path/file.pkl") as input

While this code works fine:
`
with tf.io.gfile.GFile("gs://bucket-name/path/file.pkl", "rb") as infile:
      df = pd.read_pickle(infile, compression=None)
`

Might be reasonable to amend the documentation with this if the above is true for the recent version of pandas.

