What is the correct action when ATC tells you to "expect the GPS approach to runway 30"?

When ATC instructs you to "expect the GPS approach to runway 30," the appropriate action is to load the approach in your navigation system. By loading the approach, you are preparing your aircraft's avionics for the upcoming procedure, which allows for a smoother transition when the time comes to start the approach. This method ensures that you can follow the correct waypoints and altitudes outlined in the approach plate, enhancing safety and efficiency during the flight.

It’s essential to understand that loading the approach does not mean you are cleared to initiate it; it indicates that you are preparing for it when cleared. This readiness is vital in busy airspace, where ATC may give further instructions shortly after. Each phase of flight requires the pilot to be mindful of situational awareness, and preparing for the approach aligns with proper procedural steps, allowing for flexibility as conditions change or as ATC provides more guidance.