>>47551710>For the video games "Gold" was just a stand-in fan termI wouldn't say it was uniquely a fan term. The game manual used the names "Gold", "Silver" and "Kris" (JP manual only) for the male protagonist depending on the version.
And even before the remakes, it was already clear that "Silver" belonged to the rival, because it was his default name in Crystal. Gold ended up as the male protagonist's name by the process of elimination. Pokéspe also helped to confirm these choices.