Open an existing classification solution definition and click to select word corpus - look for GLOVE in list of corpora and it's not there.
GLOVE: GloVe (Global Vectors)
WordCorpus is a pre-trained word corpus could lead to better predictions and reduce the time needed to train your solutions.
It does not require any explicit training.
However Glove embedding is only available for Similarity Solutions.
And it will not show up for any other capability.
Under Similarity Solutions, it is showing up.