So, what this seems to be saying, and what is reflected in the settings screens I can access on devices I have at hand, is that Gemini will still have (limited) functionality hooking jnto certain apps even if you've disabled "Gemini App history".

The app is being pushed through normal updates via Google Play (by your carrier or Google itself). In some cases the app can be uninstalled by the end user through the normal UI, and in other cases it installs as a system app and requires adb to be used to disable and/or uninstall it.

EDIT: FALSE, GOOGLE HAS NOT PUSHED THE APP OUT YET, JUST A SETTINGS PAGE

As always, the most secure way to use android is through a custom locked down ROM like Graphene OS.