Geckos have vocal cords. To me, that makes it surprising that they’d be a popular pet, since most special sleep all day and creep around being noisy at night.
Oh yeah, I forgot they can chirp. Our geckos here (south FL—I’m sure they are invasive species) don’t seem to make any noise. But I recall, as a child, living in the Philippines, hearing the chirp sort of like a cricket, at night. We would see them on the walls (yes, in the house). I thought they were cool, even then.