Gremlin is indeed the query language but requires a gremlin engine. This is generally passing strings to the DB (which gives you advantages like pushdown-predec

Gremlin is indeed the query language but requires a gremlin engine. This is generally passing strings to the DB (which gives you advantages like pushdown-predecate, essentially DB-side filtering) but there is associated overhead with something like Cypher that is now serialised and very fast with the Bolt protocol