The problem with quoting, well, pretty much any Church Father or Council from the 4th century, and even the 5th century, is that for every position you give a quote to support, I can give at least 3 quotes that give completely contrary views. For example, people bring up Athanasius. In Letter 39, Athanasius said of the apocrypha: "there are other books besides these not indeed included in the Canon, but appointed by the Fathers to be read by those who newly join us, and who wish for instruction in the word of godliness. The Wisdom of Solomon, and the Wisdom of Sirach, and Esther, and Judith, and Tobit, and that which is called the Teaching of the Apostles, and the Shepherd. But the former, my brethren, are included in the Canon, the latter being [merely] read". But here are what other authorites/fathers said...
Cyril of Jerusalem said of them: "Learn also diligently, and from the Church, what are the books of the Old Testament, and what those of the New. And, pray, read none of the apocryphal writings: for why dost thou, who knowest not those which are acknowledged among all, trouble thyself in vain about those which are disputed? Read the Divine Scriptures, the twenty-two books of the Old Testament, these that have been translated by the Seventy-two Interpreters." (Catechetical Lectures, 4)
Hilary of Poitiers said: "There are twenty-two books of the Old Testament... To this some add Tobit and Judith."
The Councils of Hippo (393) said: "Besides the canonical Scriptures, nothing shall be read in church under the name of divine Scriptures. Moreover, the canonical Scriptures are these: Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua the son of Nun, Judges, Ruth, the four books of the Kings,(a) the two books of Chronicles, Job, the Psalms of David, five books of Solomon,(b) the book of the Twelve [minor] Prophets, Isaiah, Jeremiah, Ezekiel, Daniel, Tobias, Judith, Esther, the two books of Ezra,(c) and the two books of the Maccabees." (Canon 36)
The Councils of Carthage (397--Canon 24) and Carthage (419--24) agree with the Council of Hippo (393).
Augustine said: "Now the whole canon of Scripture on which we say this judgment is to be exercised, is contained in the following books... Tobias, and Esther, and Judith, and the two books of Maccabees,... For two books, one called Wisdom and the other Ecclesiasticus, are ascribed to Solomon from a certain resemblance of style, but the most likely opinion is that they were written by Jesus the son of Sirach.14 Still they are to be reckoned among the prophetical books, since they have attained recognition as being authoritative." (On Christian Doctrine, 2, 8 )
Junilius said: "'Do no other books belong to divine history?' Many people add two books of Paraleipomena, Job, Tobit, Ezra, Judith, Esther, two books of Maccabees. 'Why are these books not current among the canonical Scriptures?' Because among the Hebrews, too, they used to be excluded with regard to this distinction, just as Jerome and the others testify... 'Which kind is the proverbial?' A certain figurative manner of speaking, saying one thing, meaning another, and giving advice in present time. 'In which books is this kind received?' In two, Solomon's book of Proverbs and the book of Jesus, grandson of Sirach. 'Is no other book put under this kind?' Certain people add the so-called book of Wisdom and the Song of Songs." (Instituta Regularia Divinae Legis)
And Junilius says something else in this work that I think is quite important: "'How is the authority of the divine books viewed?' That certain ones are of complete authority, certain of moderate, certain of none. 'Which are of complete authority?' Those canonical works which in their several kinds we have completely enumerated. 'Which of moderate?' The ones which we have said are added by many. 'Which are of no authority?' All the rest. 'Are these distinctions found in all the kinds of discourse?' All these distinctions are found in history and plain teaching; but in prophecy, books of moderate authority are not found, except for Revelation, nor in the proverbial kind are there works altogether devoid of authority."
The Canons of the Apostles said: "To all you Clergymen and Laymen let the following books be venerable and sacred... three of the Maccabees... it is permissible for you to recount in addition thereto also the Wisdom of very learned Sirach by way of teaching your younger folks." (Canon 85)
According to Jerome, The First Ecumenical Council included the book of Judith in it's O.T. Canon (Preface to Tobit and Judith)
And finally, the 2nd Canon of the 6th Ecumenical Council accepted numerous earlier canons which contradict each other regarding what constitutes the canon of Scripture.
Anyway, that is just a quick glance at the 4th through 7th centuries, but hopefully it's enough to justify GIC's "let's get 'em thinking" approach, rather than encouraging the normal "let's get into apologetic mode" approach, which I see in chatrooms all the time and drives me bonkers