Gold Slimes behave like regular slimes when the player has not been noticed.
And even have the ability to
stack.
But will actively try to flee at any given opportunity once the player has been noticed, until it despawns.
Gold Slimes can despawn even while being fed.
And can despawn instantly when hit in the face.
They are sensitive to the vac stream; they don't need to touch it to be affected by it.
They can be equipped with Fashion Pods.
When on a #1 Slime Stage they do not flee, and do not despawn.
...but will as soon as it comes off.
Gold Slimes responding to a nearby Slime Toy.
One of the more iconic GIFs of a Gold Slime encounter.