Is Gala built on Ethereum?

Could you please clarify for me if Gala is indeed constructed upon the Ethereum blockchain? I've heard various discussions about its technological foundation, but I'm still uncertain about its exact relationship with Ethereum. Would you mind shedding some light on this matter? It would greatly assist me in understanding the intricacies of this cryptocurrency project. Is there a specific reason Gala chose to build on Ethereum, or are there other technological advantages that Ethereum offers that Gala leverages? I'm eager to learn more about the decision-making process behind this choice. Thank you for your time and expertise in this matter.