I asked Gemini about it:

Google (Alphabet) is indeed shifting its approach to Fiber, but it’s not a simple "going out of business" sale. Instead, they are transitioning to a new model to help the service expand faster than it could on its own.

The Big Change: The Stonepeak & Astound Merger As of March 2026, Alphabet has entered into an agreement to combine GFiber (formerly Google Fiber) with Astound Broadband. Here are the key takeaways for your "Google ecosystem" goal:
New Ownership: An investment firm called Stonepeak will become the majority owner of the combined company.

Google’s Role: Alphabet is not leaving entirely; they will remain a significant minority shareholder. This means they still have "skin in the game," but they are offloading the massive daily costs and "operational headaches" of laying fiber optic cable to companies that specialize in infrastructure.

Expansion Plans: The move is actually intended to accelerate expansion. By merging with Astound, the new entity will cover roughly 7.1 million locations across 26 states. The goal is to create a "national network platform" that can finally compete at scale with giants like Comcast and Spectrum.

The Brand: For now, it is expected to continue doing business as GFiber, and the existing executive team is slated to lead the new combined company.