To me, "fall in line" means to line up in a row (said to a group of people to get them organized into an orderly line) or, more idiomatically, to acquiesce (as in "Robert had trouble following orders, but after his father gave him a strict talking-to, he finally fell in line.")
"fall in queue", "take the line", and "take the queue" mean nothing to me. I've never heard them.