Hi, Sarah! I have a bit of a man crush on Gaston myself.
Like your 3 year old, I would love to see more Gaston in the parks. Outside of his brilliantly performed role (several times daily) at
Beauty and the Beast - Live on Stage at Hollywood Studios, Gaston is a bit of a rarity to find elsewhere. There have been whispers that he's been seen at the France pavilion in Epcot.
The good news? Gaston's Tavern is being built as part of the
new Fantasyland expansion at Magic Kingdom, scheduled to be completed - in full - in 2013. I've got big hopes for Gaston's Tavern too - things like antlers donning the walls and a 5 dozen egg appetizer, for starters.
In regards to beverages ["More beer?...What for?"] - the writing is on the wall. And while these words may be obstructed by antlers, or worse, chest hair, it would read as follows: there's no beer in the Magic Kingdom.