Identify whether you have a GFCI outlet (receptacle) by looking at the face of the outlet. If there is a "reset" button, possibly accompanied by one or two LED lights, then your outlet is GFCI protected.
Locate your circuit breaker box. These are usually gray in color, in the lower level, or basement of the home. There will be a metal door on the panel. Open the door to reveal the various circuit breakers in your home.
Identify a GFCI breaker in you breaker panel through visual inspection. If your breaker is GFCI protected, there will be a "push here to test" button located on the face of the individual breaker. If you locate one of these breakers in your home, it means that every outlet on that circuit is GFCI protected.