Gold isn't more conductive. It's about .76 if Copper is 1.0. Silver is the most conductive at 1.06, and is a great conductor of heat as well. That's why you get silver bearing thermal paste.
Gold is used in electronics because it doesn't corrode, but if plated wrong or thinly the base material will still leach through and corrode the surface. It has to be completely removed from soldering surfaces in military applications.
Here's a good chart for reference. https://www.tibtech.com/conductivite.php?lang=en_US
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