what brand or where can i find this gold i keep seeing in cakes, it has a 14k look, nice and shiny.

Hi Jenmarlene

They are the gold leaf sheets.   you can find them on Amazon

Is it edible?

Per the FDA, no, neither real gold metal, nor silver, is approved for use on food that will be eaten.  I have this directly from a phone conversation with a specialist at the FDA in Washington, DC. 

You will see 23K gold sheets advertised as "edible".  Generally, those sources are from other countries, where the regulations are different, but those regulations do not transfer to the US.  The FDA has the last word here.

You will also see a variety of metallic dusts that produce a very shiny surface.  The newest player is a South African company that uses "E" numbers to list ingredients.  E174 is silver and E175 is gold.  The dusts are described as "non-toxic, edible"--actually, non-toxic and edible should never be in the same sentence.  Non-toxic products are NEVER to be eaten [see the FDA notice below].  They may be in other countries, but they are definitely NOT FDA approved for use on/in food.  Because they contain real metals, they may be OK to use like highlighter dusts--only on decorative items that will be removed and not eaten.

http://www.fda.gov/Food/IngredientsPackagingLabeling/FoodAdditivesIngredients/ucm481466.htm

There are fully edible metallic luster dusts that use FDA certified ingredients [thesugarart.com; pristinepowders.com; sugarpaste.com; globalsugarart.com ]  They will give you a lovely, edible finish.  No, they won't look like highly polished metal, but they will be shiny, but at least they can be consumed without worry.