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Thank you so much for all your answers.  The consensus is that it is mold and GFand okay to eat.
I used to serve and eat this as an appetizer, just a hunk/slice of Brie and some cranberry sauce over it warmed in the microwave.  Delicious!
Thanks again,
Linda in Pa.

It is mold.  Brie is in the "bloomy rind" family of cheeses.  The rind is made up of mold that gets packed down.  The bloomy stuff is the mold itself.  Look at www.murrayscheese.com for a quick introduction.

The white over the cheese is a mold that's meant to be eaten with the 
cheese. It's edible and GF.

Hi the white powdery stuff is a kind of mold special to the brie or
camembert cheeses. It is healthy and gluten free. I love Brie.

My understanding is that it is the mould that grows on the surface of the cheese while it is maturing.  When they package the cheese, the fuzzy mould gets squashed down.

I was told a long time ago that it is something that leeches out of  
the cheese as it ages.  It is therefore cheese and not anything added.

Again, I was told that more than 10 years ago.  We have eaten brie  
cheese since with no ill effects but I do not remember specifically  
what it was that comes out.

It is an edible mold produced from a type of penicillium bacteria that is applied during the cheese making process. It is gluten free. 

It's simply a brine (salt) and it's gf.

MOLD...  from www.ask.com   
Brie is a soft cows' cheese named after Brie, the French province in which it originated (roughly corresponding to the modern département of Seine-et-Marne). It is pale in colour with a slight greyish tinge under crusty white mould; very soft and savoury with a hint of ammonia. The white mouldy rind is edible, and is not intended to be separated from the cheese before consumption.

The cheese is then taken out of the moulds, salted, inoculated with cheese mould (Penicillium candidum, Penicillium camemberti and/or Brevibacterium linens) and aged in a cellar for at least four to five weeks.

Its mold
http://www.reluctantgourmet.com/blog/all-about-cheese/moldy-brie-cheese/


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