GraalVM is currently based on . However, GraalVM 19.3, due in October 2019, will be based on , which arrived in September 2018. By moving to Java 11, which is a long-term support release of Java, GraalVM will enable users to take advantage of the Java module system for applications (introduced in ) and garbage collection optimizations (introduced in Java 11). Another improvement eyed for GraalVM is an ARM64 back-end, which will also depend on Java 11.
GraalVM is used by organizations such as Twitter. It is available in an open source community edition and in a .
Where to download GraalVM
You can from graalvm.org.