Hi grandpeh,
I'm sorry you were not able to join the Gold server due to the high volume of players! As a player, you will need to wait it out until there is enough room to join or play on another colored server, such as Emerald or Silver (I'm on there a lot so feel free to say "Hi" <3). However, if you purchase a rank, then you can automatically join the server regardless if the maximum player count is reached! If you need anything else, please feel free to let us know.
Cheers!