Gold is the definition of gold coins. In this game, players refer to it as RS Gold. RS 07 gold is the coins used to trade in the game! You can use it to purchase games, weapons and other equipment required for the materials. You can also buy or sell them, too. It is also possible to earn more RS 07 gold using it. You can look up RS 07 gold on Google Plus.
To see this working, head to your live site.