Geckos are lizards, not amphibians. They belong to the family Gekkonidae, which is a part of the larger order of reptiles called Squamata. Unlike amphibians, which generally have a life cycle that includes a larval stage in water, lizards including geckos are fully terrestrial animals. They have scaly skin that helps prevent water loss, which is a characteristic feature of reptiles.
Amphibians, such as frogs and salamanders, typically require moist environments and often have a dual life stage, starting in water and then transitioning to land. Geckos, on the other hand, are adapted to various environments, from arid deserts to tropical forests, and they breathe air and lay eggs on land.
In summary, geckos are indeed lizards and share many characteristics with other reptiles, differentiating them from amphibians in terms of biology, reproduction, and habitat preferences.