We plan to apply next year. Google has different priorities for participating organizations every year, so we're not guaranteed a place. When we have information to share, I'll post it, but it won't be until early next year.
If you are interested in contributing to MIT App Inventor as part of GSoC or not, our info post for 2025 GSoC contains a lot of useful information about getting started: Google Summer of Code (GSoC) 2025
We welcome your contribution!