My guess is that it was built by the Gemini CLI team and institutional pressures caused this name, either to make sure they get credit, or to avoid making it sound like they’re taking over a very broad product area.

Because it installs gemini-cli in the GitHub Action VM and then passes the comment from the issue/PR as prompt to gemini-cli.

I wondered the same thing, naming things is hard but they've royally screwed up the naming here.

not surprising from a company that greenlighted the name 'bard' for their AI.

This is an add-on to Gemini-CLI, which is entirely local.