Looks to me the grounds and neutrals are bonded in that box .... ( ie going to the same place)


as for still seeing some open grounds.. not all boxes are single runs.. IE say on one wall you have 3 outlet boxes... those will all be one circut and unless the grounds are tied togetehr thru them all it wont go all the way back to the box.


also without a ground that gets to ground ( ie open) a GFCI is pointless as it wont work correctly.