Is Gala built on ETH?

Could you please clarify for me if Gala is indeed constructed on the Ethereum blockchain? I've heard some rumors but would like a definitive answer from an expert in the field. If it is indeed based on ETH, could you also explain what advantages this might bring to Gala's functionality and potential? On the other hand, if it's not, could you point out any alternative blockchain technology that Gala might be leveraging? I'm eager to understand the technological foundation of this project in greater detail.