GQL was just inaugurated as an official ISO project.
See New Query Language for Graph Databases to Become International Standard
Enterprise Knowledge Graph 2020
...GQL standards committee process. Database companies Neo4j, TigerGraph, Oracle, Faircom, Amazon, and Google, there are also graph user communities from healthcare (Optum) and federal agencies participating in the standards process...
Apache TinkerPop "Gremlin" graph query language
Amazon Neptune - Fast, Reliable Graph Database built for the cloud