Bally's Silver Sails is the sister game to Golden Gate, and contains all the features of Golden Gate, but has a completely different art package.
In this episode, I talk about those differences, then stumble on the one minor electrical difference in the backbox. Aside from this, artwork and playability are discussed.
In Jeffrey Lawton's Bally Bingo Pinball Machines, pg. 107, you can read about how the Golden Game works and what is involved in winning this special mode.