Here's an easy way to create a gold foil texture in Photoshop.
If you want a huge toolkit for adding foil textures to your work you should checkout the RetroSupply Hot Foil Kit. It includes:
• 9 Real and Digital Foil Textures in Gold, Bronze, Silver and Holographic
• Flake and Crinkle Textures
• Editable Background Paper Textures and Colors
• 3 Actions that Create Foil Textures Instantly
Learn more here: http://bit.ly/1zJVWCo