What is 3 letter word that starts with gas?

Here's some information about 3-letter words starting with "gas":

"Gas" is a state of matter. In chemistry, a <a href="https://www.wikiwhat.page/kavramlar/gas%20(chemistry)" >gas (chemistry)</a> is a substance that freely disperses due to having no definite shape or volume. Common gases include oxygen and nitrogen which make up a significant portion of the Earth's atmosphere. A <a href="https://www.wikiwhat.page/kavramlar/gas%20giant" >gas giant</a> is a large planet composed mainly of gases, such as Jupiter and Saturn. <a href="https://www.wikiwhat.page/kavramlar/natural%20gas" >Natural gas</a> is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, and is used as an energy source.