Any Mopar Tech's here - Grand cherokee 4.7 loosing coolant.

Most 4.7L I have worked on have a combustion leak into the coolant system and push coolant out of the radiator into the overflow bottle.when it cools the coolant in the over flow empties back to the radiator....
Try starting it cold with overflow hose pinched or empty and the radiator cap off/
Let get to operating temperature and see if it pushes coolant out.
I will run a customer vehicle to operating temperature with cap off and sniff the gases coming out of the radiator for HC (FUEL) and I can confirm head gasket problem.
you can also purchase head gasket leak detection tool,blue fluid changes to yellow in a test tube that fits over radiator neck....
you could just top it off cold and run it up to temperature with the radiator cap on and feel your radiator hoses.if they become rock hard due to pressure,you got a blown head gasket.It is common on the 4.7L and if overheated badly the valve seat in the heads come loose...