I just did this for my Wife. (Christmas Present) For me getting the gas line through the outside to the inside of the fireplace was a little tricking (measurements had to be exact or It would look like poop.) Other than that, a direct vent insert fit right in. I picked up a model from Napolean fireplaces here in Ontario. I was surprised at how easy it was.
She loves it......
No big deal Papa, as long as you can get gas line there and liner ( or 2 ) down the chimney. You might want to get 120V up there as well if you go with fan option. You have a on/off switch on surround or put a remote controll on it and enjoy.
There is no bad beer, some just taste better than others.