The answer to 'why is my GFCI outlet power surge' is that a GFCI (ground fault circuit interrupter) outlet is designed to trip and cut power when it detects a ground fault or power surge. This is a safety feature to prevent electric shock hazards. Common causes of GFCI power surges include faulty electrical wiring, overloaded circuits, or a malfunctioning GFCI device.
If your GFCI outlet is repeatedly tripping or surging, it's important to troubleshoot the underlying issue. You can try resetting the GFCI, checking for any loose or damaged wiring, and ensuring you're not overloading the circuit. However, if the problem persists, it's best to call a licensed electrician to properly diagnose and resolve the issue, as electrical problems can be dangerous if not addressed properly.