He is at first depicted as being the leader of a team composed of highly skilled people calling themselves The Ten Wise Men, who attempted to take control of the universe four billion years ago. After a long imprisonment in Eternity Space, they have returned to attempt to conquer the Universe once more.
The truth is that Gabriel, once known as Dr. Lantis, is in fact the creator of the Ten Wise Men, who are actually biological weapons created by order of Energy Nede's ancient government to keep ruling the universe with an iron fist four billion years ago. Due to the death of his daughter, Lantis reprogrammed the Wise Men and made himself their leader in order to destroy the universe instead of conquering it. He then sealed the ten of them away for four billion years when he realized how difficult it would be to accomplish his goal at that point in time.