Antigravity 2.0 IDE - point usage to GCP project

It’s possible to use GCP project as model backend for Antigravity CLI and Antigravity Desktop, but couldn’t find a way how to configure GCP project as a model backend for Antigravity IDE.
Is there any way please? Has anyone tried?

Version: Antigravity IDE 2.0.3

This has been a major time-sink for me lately, attempting to get a Gemini Code Assist Standard license to work with Antigravity IDE 2.0.4. The authentication pathway for using a Google Cloud project is currently completely missing, and no combination of purging settings, gcloud CLI authentications, Antigravity CLI authentications, or using the Google Cloud Data Agent Kit extension (as recommended by Google Cloud Support) in any sequence has worked. There also does not appear to be any current documentation describing how to get Antigravity IDE to work with a GCP project, only vague indications that it’s supposed to work somehow and is the route you’re supposed to use for non-personal business/enterprise usage, now that the Workspace add-on that included Gemini Code Assist has been eliminated.

Maybe in some future release they’ll add the missing GCP authentication flow, that is currently present in Antigravity & Antigravity CLI, and appears to work there. And hopefully when they do, there will be actual documentation. But for now I’m pretty sure that short of exotic workarounds (while the exotic workarounds I’ve attempted with GCP support have failed), this doesn’t work.

If anyone has actually been successful here and has some magic secret dance that worked, I’d love to hear it.