I agree with all that was suggested.
To learn Shotokan, you need to set aside your previous expectations, knowledge, and assumptions because the philosophy of Shotokan is different from that of Goshin Jutsu. A similar movement may have a totally different reason for existing.
Refrain from speaking, watch, and learn what Shotokan has to offer... later on, when you have achieved an understanding of Shotokan, you may find that your Goshin Jutsu experience will help open up possibilities in interpretation, and understanding your own path more fully.
If you speak up now, you may confuse others, alienate others, and lose out on what you can learn.