The Gasman is the second-youngest of the original Flock members. He earned his name from the fact that he frequently passes gas, although he is often called Gazzy or Gaz instead.
Before The Angel Experiment
Gazzy's mother sold him to the school for $10,000 when he was very young. At the School—as hinted at in The Angel Experiment—he was forced to undergo various dangerous experiments that would leave him sick and dying. He eventually escaped with Jeb Batchelder and the rest of the Flock and went hiding in the Sangre de Cristo Mountains.
The Gasman has fine blonde hair and blue eyes, and he is tall for his age like the rest of the Flock. The color of his wings has never been mentioned, but his wingspan is 10 feet, as described in the fifth book, MAX. Angel says that he had the DNA of a "sturdy" bird, like an owl. Fang, on the other hand, thinks Gazzy was like an emu, as described in the fourth book.
Gazzy is revealed to be afraid of spiders in School's Out - Forever. He is also afraid of the whitecoats and being captured and experimented on again, as is the rest of the Flock.
Though Max doesn't consider it a skill, Gazzy has the power to pass gas. Max claims that he has a funky digestive system in the first book; fittingly, he gets the ability to release a gas that is yellow-green in color in The Final Warning. Quoting Max, "... I swear to you, it was literally a green mushroom cloud."
Gazzy had relied on the element of surprise, as he often does. First, he’d perfectly mimicked a bird call, making a guard look up. Gazzy had tagged that guard. Then, when the guards were in pursuit ... Gazzy incapacitated the guards, leaving them coughing and gagging, gasping on the ground, their eyes watering. Then he raced through the trees, cackling in triumph, and burst out into the clear meadow where the lieutenant colonel was waiting with a clipboard and a stopwatch.
He also has the ability to mimic any sound or voice, which gives him the power to pull pranks on the rest of the Flock and other people. He uses this to his advantage in MAX, when the Flock was in the covert ops part of the BS training.
Another time, he mimics Fang saying mushy things about Max, though Max knew he was lying since Fang was right next to her and since she new he would never act that embarrassing. In Saving the World and Other Sports, he mimics Roland ter Borcht as well when Nudge teases him.
We saw big thunderheads forming in the distance—the first time in years, I bet! Then—check it out! This house had a lightning rod on the roof! That's a metal pole that sends any lightning bolts into the ground. We disconnected it, aimed it at the dumb-bots, and enhanced its powers a tad! Next thing you know, they’re extra-crispy! And the best part? They were standing so close together that they helped fry each other!
Gazzy also is surprisingly knowledgeable when it comes to making explosives. He is "partners in crime" with Iggy, as Max says. In School's Out - Forever, he and Iggy made William Pruitt, the principal (or "headhunter", as the Flock likes to call him) mad when they detonated a stink bomb and an explosive at the school. In MAX, he uses his talent multiple times to save the Flock and the surrounding people from disaster (one of these times, he turns the "barbies" (M-Geeks) into "ken dolls").
Another time, the Flocks' temporary house was surrounded by M-Geeks, and he and Iggy managed to save them.
In FANG, Max throws a birthday party for everyone, making Gazzy turn nine. His birthday present to the Flock was fireworks with the letter of their names in the middle, indicating that he also has knowledge of pyrotechnics.
The Gasman and Iggy are best friends, and often work together to build explosives, pull pranks, or do tasks for the Flock. Iggy is described as Gaz's best "partner in crime." It is hinted that Gazzy also looks up to him.
Gazzy is the biological older brother of Angel, and they are the only members of the Flock who are actually related. In Saving the World and Other Extreme Sports, at the School, it was revealed to him that his mother sold him for $10,000.
Max acts as mother to Gazzy. Because Gazzy tries to act tough in front of the rest of the Flock and for Angel, Max usually holds his hand since he is still a child inside.
Fang is somewhat like a father to Gazzy. In Saving the World and Other Extreme Sports when the group splits up, he holds Gazzy's hand while Max is gone.
Gazzy is the only character in the flock who doesn't temporarily leave on his own.