Yu-Gi-Oh Premium Gold Box - Rules of Play says:

TCG Premium Gold introduces a new rarity, Gold Secret Rare.

There are 32 Gold Secret Rares in this set, 29 are all never-released cards in the TCG and 3 are the original artwork Egyptian God Cards!

In each pack you will find 15 cards, 6 will be Gold Secret Rare cards, the other 9 will either be reprints.

Yu-Gi-Oh Premium Gold Box Review:

Don't just take our word for it! Check out this review of Yu-Gi-Oh Premium Gold.