I am remodeling a basement and the power going down comes off a split pole 20 amp breaker with 12/2 wire. I was told I need to install a GFCI. Is it possible to install 1 in the first outlet and the other 5 in line thereafter will be protected as well or would it be better to reeplace the breaker with a split GFCI. The house is 20 years old and the other half of the current breaker serves the kitchen. Thanks.