In some (maybe questionable) pedagogical texts at least, gold chloride solution is presented as an electrolyte in the electro deposition of gold.
In practice however, it seems that cyanide based solutions are used instead. Please excuse my ignorance, this is not my field of study, but could gold chloride be actually used in practice as an electrolyte?
The application is electroplating 304, 316 stainless steel and cast iron ornaments.