It may be a matter of terminology. The proto-Orthodox saw Marcion as part of a broader heretical tradition large parts of which were Gnostic. I'm doubtful whether Marcion was regarded as a Gnostic as such.
Andrew Criddle
It may be a matter of terminology. The proto-Orthodox saw Marcion as part of a broader heretical tradition large parts of which were Gnostic. I'm doubtful whether Marcion was regarded as a Gnostic as such.