built in stages not supported

I have a job which runs in the .pre stage. GLE tells me the following when I try gle -l

error: Config error: job debug has stage .pre which does not exist

GitLab has 2 predefined stages .pre and .post, if I specify them in the stages: section GitLab complains that this is already defined and to remove it. I was expecting to use GLE against existing pipeline definitions.

Can these built in stages be supported by GLE please?

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