Cypher query language has been made popular with Neo4J and is being standardized as openCypher. The openCypher page mentions SQL/GQL but the GQL page has last been updated in 2019. Meanwhile the SQ...
Kùzu is another open source property graph database management system with support of Cypher query language just like #neo4j and #memgraph (and Oracle with PGQL): https://kuzudb.com/