I have heard those questions before, but Goshin jutsu translates easily in Selfdefense techniques.So this can be anything. Officially in Wadoryu curriculum there are 14 yoshi goshin jutsu techniques (selfdefense techniques for woman), however, I have only seen (perhaps some of the original) on the DVD from Mr. Jiro Ohtsuka. All other goshin jutsu I have seen are applications of the knowlegde of sensei. Or in other words "made up".
The Goshin jutsu kata from judo is not featured in this DVD.