Yes, one would have expected the Gospels to more overtly refer to the Pauline texts: that they don't may reflect a few things. Both sets of texts may have arisen at the same time in separate communities.It is imperative that the chronological order of writings in the NT be understood.
The Gospels or stories of Jesus, especially the Synoptics, predated all the letters in the Pauline Corpus.
If the writers called Paul actually preached and wrote letters directly to Churches before the Jesus stories called Gospels were known then it would be expected that the authors of the Gospels would have used or would be influenced by claims in the supposed letters.
There is simply no historical evidence that any of the NT Gospel writers were aware of or influenced by the teachings or preaching of the supposed Paul or attended any Church supposedly started by Pauline characters.
Though, I think Robert Price proposes the Paulines are a joint effort by a few people in the 2nd century, including Polycarp & Marcion. It seems many of the Pauline epistles are represented in the Marcionite texts, though we only hear about that from Tertullian in the early 3rd century?? [eta: Passages of the Pauline epistles are represented in the writings of Irenaeus, and some think Tertullian's Adversus Marcion is based on a similar text of Irenaeus).
I think there have been a few people now suggesting the Synoptics arose out of the Marcionite community or their texts. J Dyson? Vincent?
Tom Dykstra's Mark Canonizer of Paul: A New Look at Intertextuality in Mark's Gospel (2012) draws connections between Paul and the Gospel of Mark.
Last edited: