The reach of Bhagavad gita

I saw this guy with a little beard standing near his scooter, getting his stuff out and I approached him. He was really curious about spiritual stuff, though i started from perfection of yoga we quickly settled for a Bhagavad gita and he said he would come visit us. His Iron Maiden t-shirt with a half lion half man t-shirt caught my eye. He expressed his interest in spirituality, spiritual music and even wrote an email later saying he would like to come see us.