It seems like everyone faces judgment including the fallen angels who will face judgment on the great day according to 2 Peter 2:4, "For if God spared not the angels that sinned, but cast them down to hell, and delivered them into chains of darkness, to be reserved unto judgment;"  and according to Jude 1:6, "And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day."  

The giants are dead, and their bodies are either buried in the earth or in the ocean because of the flood in Noah's time that covered the whole earth.

Rev. 20:5 says, "But the rest of the dead lived not again until the thousand years were finished. This is the first resurrection." Does this not include the giants who are dead that will live again in their physical bodies again called the second resurrection? Rev. 20:13, "And the sea gave up the dead which were in it; and death and hell (Hades) delivered up the dead which were in them: and they were judged every man according to their works."  

According to the book of Enoch chapter 19:1-3, the giants will be judged.   It says, "Then Uriel said, Here the angels who cohabited with women, appointed their leaders; And being numerous in appearance made men profane, and caused them to err; so they sacrificed to devils as to gods. For in the great day, there shall be a judgment, with which they shall be judged, until they are consumed; and their wives also shall be judged, who led astray the angels of heaven that they might salute them.  And I, Enoch, I alone saw the likeness of the end of all things. Nor did any human being see it, as I saw it. " Chapter 19 – The Book of Enoch  So yes, it does look like the giants are resurrected from the dead to be judged along with their fathers, who are the fallen angels. So could "the great day" that both fallen angels and giants be judged be the same day as mankind is judged at the great white throne judgment after the second resurrection when men are resurrected in their physical bodies? (Rev. 20:11)