"As we know Him." Well, now, that is the rub, isn't it? How do we know Him as the "Son of God?" What does that really mean? Is what you mean by it exactly the same thing the Pope means by it? Yes, maybe you assent to the same words, but is the same understanding really what is in both of your heads?
What do we really know about that relationship? Certainly it's not the kind of sexually derived genetic relationship we usually mean by "son." Nor could John have really meant that even when he used the word "begotten."
We understand this is an analogy that explains the relationship only in part, and we don't even have a way to understand which part. The Greek monogenes that is translated as "begotten" means only that it is a special, unique relationship shared by none other.
Can a Muslim get to that? Sure, it's only a very small step from what the Koran says about Jesus. Just go through the gospel and let the gospel say "son of God" the way the gospel says it, and a Muslim can get to that.
Let the gospel say that Jesus is the image of the invisible God, and a Muslim can get to that. Let the gospel say that all things created were created through Jesus, and a Muslim can get to that.