I have always admired your datoviz library from afar and check the vispy2/vispy2-sandbox libraries on GitHub every few months to check up on it. When do you think 'soon' is?? Really looking forward to it!
Implementing the API on top of GSP should be relatively straightforward, as the core graphics-related mechanisms are handled by GSP/Datoviz. We've created a Slack channel for discussions—contact me privately if you'd like to join.
[1] https://github.com/vispy/vispy2/blob/main/ARCHITECTURE.md