Huh. I thought the OPC website said that the Good News of Jesus Christ was John 3:16.
See, unlike Rome, the OPC and other Protestant denominations actually DO know what the Good News of the Gospel of Jesus Christ means.
And that Good News is spoken of in John 3:16 and hundreds of other Scriptural passages and is reiterated in the "Five Solas of the Reformation."
It's not surprising that Roman Catholics would have a difficult time recognizing this fact since so many of them cannot tell us what the Gospel is.
You may have (finally) pointed us to John 3:16 as your answer to the question of what is the Gospel of Christ, but you have yet to tell us why you believe this.
What does John 3:16 mean to a Roman Catholic?