What's the minimum version of Java supported by Gradle 2.7?

Continuing the discussion from Gradle 2.0 will drop support for Java 5 and will fully support Java 8:

How did this actually shake out with Gradle 2.0? Did it actually drop Java 1.5 support?

Yes, here are the release notes for 2.0. Gradle 2.x can only run on Java 6 or newer, but can build for Java 5 and newer.