Not directly - GraFlo is for the ingestion side, not migration. Migration between different property graph DBs isn't trivial (and sometimes not even possible) because they're organized in fundamentally different ways. Some are much more flexible with uniqueness constraints, indexes, or how they handle certain graph patterns.
But the nice thing is: if you have your source data and GraFlo schema, regenerating your graph in a different DB is trivial. GraFlo handles indexes and constraints for each target database. It's like having the recipe instead of trying to reverse-engineer the cake.