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You can optionally add gold plating to all pads in a part or to individual pads.

Gold plating on PCBs refers to the application of a thin layer of gold over the copper traces, pads, or other elements on a PCB. Gold is used because of its excellent conductivity, resistance to tarnish, and ability to provide a robust solderable surface. There are two primary methods of gold plating on PCBs: Electroless Nickel Immersion Gold (ENIG) and Hard Gold Plating.

Gold plating is normally applied to edge connectors.

When you generate Gerber manufacturing files, top and bottom gold Gerber files will also be generated. No  Gerber files will be generated if there are no pads with gold plating.