First, his hand is making the symbol that a priest or, more notably, the Pope makes when he offers an official blessing. Look up a video of the Pope and you'll see it.

Second, in America, "God is my Pilot" or "...my Co-pilot" used to be popular bumper stickers on cars. I still see them from time to time.

Perhaps a bit in questionable taste if you're speaking to a devout Catholic, but otherwise very funny. :)