The Great White Throne of Judgement is when God judges all non-Christians. It is described in Revelations 20:11-15.

Revelations 20:11-15
And I saw a great white throne and Him who sat upon it, from whose presence earth annd heaven fled away, and no place was found for them. And I saw the dead, the great and the small, standing before the throne, and books were opened; and another book was opened, which is the book of life; and the dead were judged from the things which were written in the books, according to their deeds. And the sea gave up the dead which were in it, and death and Hades gave up the dead which were in them, and they were judged, every one according to their deeds. And death and Hades were thrown into the lake of fire. This is the second death, the lake of fire. And if anyone's name wans not found written in the book of life, he was thrown into the lake of fire.

The final judgement is pretty clear, all non-christians will be judged according to their thoughts and deeds. Notice that it says both great and small. Prestige, position, power, none of this matters. All are judged equally. This is a scary thought. How many times have you thought anevil thought such as being mad at someone, wanting what someone has, or just not believing that God is all powerful and in control. It only takes one of these occurances to be forever damned. If you are in the book of life, the book that says that you have chosen to have Jesus as your Lord and Savior, then you are spared this judgement.