Development
Gradle is completely open source (ASLv2 license) and is a community driven development effort, led by Gradleware.
Discussion
The Gradle development team use a mailing list to discuss issues around the development of Gradle itself. This list is open for anyone to join or participate in.
To manage your subscription, send an email to the following addresses: [subscribe] [unsubscribe]
You can also browse/search the list via Nabble and MarkMail
Source Code
The source code is hosted @ GitHub and is publicly viewable and forkable. An atom feed of the commits is available through GitHub.
Building
Naturally, Gradle itself builds with Gradle. For instructions on building the project from source, see the README file in the root of the source tree.
Contributing
If you are interested in contributing to Gradle, checkout the contributing page that lists ideas that have been identified as good candidates for community contributions.
Continuous Builds
Gradle has many continuous builds setup for different environments. You can see the builds @ builds.gradle.org.