My dear friend.....Though I have no concerns on your belief that Jesus died according to God's will, I do not agree that Jesus is mentioned in Bhagavat geeta. There is no Sanskrit word as 'panchkaya' in Sanskrit. There is a word called pancha which means '5'. Also, no one walked over water in Bhagavat Gita. These are propaganda to mislead Christians to show that Jesus is the ultimate God. I don't think any Christian needs proof from other scriptures to consider Jesus as God. So believe in Bible and live happily. Stop searching other scriptures for proof of Jesus's existence