Oracle JDK 7 supports GCM since version 7u191 (https://www.oracle.com/technetwork/java/javase/2col/7u191-bugfixes-4489527.html)
In the openJDK Bugtracker, they mention they fixed it. (https://bugs.openjdk.java.net/browse/JDK-8200684)
But I checked with the latest OpenJDK 7 241 version, and still no AES GCM Cipher Suites. I need it in an old application for TLS 1.2 support with the GCM cipher suites. OpenJDK 7 btw. supports TLS 1.2 by default since a longer time.
I even checked the source code, but cannot find the backport commits. Is it an Oracle-Only fix?