I'm Jewish. I feel that the Gospel is something I should know about, simply because it's part of our culture and our literature and it helps me understand Christians, and I can sympathize with parents wanting good entertainment for their kids that also teaches a lesson.
I have received Y'shua (Jesus) as my Jewish Messiah. I am not Jewish, but the Son of David is, and He is my Savior. I believe you are feeling this need to know about the Gospel because He is your Messiah; the Gospel is the Message of Him. He is the fulfillment of Isaiah's Prophecy. The full Gospel of Jesus Christ is preached through that Prophet, as it is through Moses, and all the Law, all the Wisdom books, and every one of the Prophets. It was through the testimony of Moses and the Gospel of John that I came to faith in Y'shua.
The Lord be gracious unto thee.
Thank you for discussing these things with me.