I didn’t get the gold sheet on the top; to me it looks like a frosting finish, or possibly a sprayed finished (sprayed colored chocolate or cocoa butter). There are impression sheets that you can use to bake sponge cake in that will imprint an image (it’s really only for thin sponge sheets or layered mousse cakes) but I don’t recognize the pattern. The top edges have piping detail on them, and then in the corner you can see the standing chocolate “fans”, which is what tells me the sides are decorated in a similar way.
The bumpiness on the fruit cake is the almonds, that’s what makes it look as if there is some sort of pattern to it. It’s just the almonds carefully placed along the sides of the cake for the photo (usually when you mask the sides of a cake with anything - crumbs, chocolate curls, chopped nuts, etc). If you have an upscale bakery in your area, they probably have examples of how to make the sides more presentable - using a decorating comb, for example to make straight or wavy lines on the sides.
Gold leaf comes in very small sheets (4x4 squares) and is difficult to apply (not impossible, just difficult) as well as expensive.