The first thing to notice about the last major event in human history before the commencement of eternity is that the Gog and Magog mentioned here bear only a symbolic relationship to the Gog of the land of Magog addressed in Ezekiel 38:2. The latter passage, in mentioning "Gog of Magog" (not "Gog and Magog as in Revelation 20:8), is referencing antichrist with the context of Ezekiel chapters 38-39. However, this last human rebellion against the Lord Jesus Christ and His millennial rule, the Gog-Magog rebellion of Revelation 20:7-9, will share much in common with that earlier attack. Both are instigated by the devil's deceit, both seek to unseat God, and both will draw unprecedentedly large numbers of troops from around the world in order to do battle with Jesus Christ at Jerusalem. For these reasons, John's sanctified use of this well-known appellation, "Gog and Magog", makes perfect sense as a generic phrase to indicate the involvement of the totality of the gentile world in this assault.

The devil’s instigation of the Gog-Magog rebellion constitutes an extraordinary act of rebellion against the perfect rule of the Messiah similar in its egregious temerity to the instigation of the Armageddon campaign (different only in that the latter was designed to resist His return rather than to overthrow His rule).
But while the beast and the false prophet are denied any further "last judgment" or process of adjudication because of their non-human status (being nephilim not created in the image of God), and are subjected to this summary though entirely just judgment instead, Satan has already been judged.
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