It is common among Gnostic, and New Age groups to proport that Jesus “Missing Years” were spent learning from the Gurus of India. It is abosolute fantasy.
It is an ancient belief that St. Thomas travelled to India and took the faith there. Today there are Orthodox and Catholic Churches that follow an East Syrian Liturgical rite The Catholics are the Malrinka Catholics, and are prominent in Goa, where St. Francis Xavier’s relics are venerated.