While still, enemies with that do not actively look for gargoyles cannot spot you. If they are, and you are not wearing armor and in a reasonable spot for a statue, they have disadvantage on insight checks on you.

If you are wearing armor while using this, and it is not enchanted to petrify or having an illusion applied, your opponents dc required to tell you appart decreases by 5

Gargoyles are beings of stone. They don't need to worry about exhaustion, and are resistant to physical tools of war commonly found. They need not worry about consuming something poidonous, for the toxin won't work on the stone gut of a gargoyle.

Creatures that would petrify other beings would be hard pressed to best a gargoyle, for they are immune to such tricks.

Gragoyles have sharp claws and brute strength. They do 1d8+ your strength mod instead of a usual unarmed strike.

Gargoyles cannot use weapons except guantlet weapons, but theu must say they are fitted for a gargoyle.

Your a m*****-f***in' Gargoyle!