We\'re looking at converting our Ant build to Gradle.
In regards to integration with Eclipse, we are looking for (conceptually) equivalent functionality for launch
The current answer to this question should be, Use Gradle's own Eclipse plugin Buildship:
http://projects.eclipse.org/projects/tools.buildship
This is supported and developed by the Gradle team and will be continuously improved in the future. It can also handle older versions (with functionality based on Gradle version availability).
Edit 2017-03-01: After the release of Buildship 2.0, the integration is even better and I recommend it (unless your already using IntelliJ, then your already set). There are still some features missing like the ability to directly debug JavaExec tasks and the ability to run precompile/preimport tasks, but those are in their Github issues list.