Hi Laura,

https://tinkerpop.apache.org/javadocs/current/full/org/apache/tinkerpop/gremlin/structure/io/graphson/GraphSONReader.html

People do not want to put effort in explaining graphSON because that is not the way to go. As said above, you can just use a TinkerGraph with addV, eddEdge and property() and export the graph to graphSON.

Best wishes,   Marc