The grounds and neutrals often go to the same buss. The exception is that when connecting to a subpanel then they are required to be connected to seperate ground and neutral busses.
I would recommend against using ground fault protection on the freezer recepticle. Any sort of motor is easily capable of tripping a gfi (usually during shutdown) and you don't want a refrigerator or freezer losing power because of a false trip. For a test, plug a vacuum cleaner into one of your gfi's and see how often the gfi trips when you switch off the vacuum. Use a (non gfi) single recepticle for the freezer (it can't be a duplex) and provide a seperate gfi protected recepticle for the required general use recepticle.
I would recommend against using ground fault protection on the freezer recepticle. Any sort of motor is easily capable of tripping a gfi (usually during shutdown) and you don't want a refrigerator or freezer losing power because of a false trip. For a test, plug a vacuum cleaner into one of your gfi's and see how often the gfi trips when you switch off the vacuum. Use a (non gfi) single recepticle for the freezer (it can't be a duplex) and provide a seperate gfi protected recepticle for the required general use recepticle.