If your walking from canada towards the other countries (on the epcot map, you'd be going from right to left) the kiosk is on the left hand side in France, kind of by the water. theyre quite refreshing and yummy! enjoy!
Grey Goose is distilled and bottled in France so that's where you'll find it on the World Showcase.
I think the France Pavilion should remodel one of their stores and make it a Grey Goose Martini Lounge. Grey Goose is already a presence in Orlando at the AMWAY Center, 180 Downtown Grey Goose Lounge , the one in Epcot could be a satellite lounge.
Neither drink has too much alcohol. DH & I tried 1 Grand Marnier & 1 Grey Goose Vodka and we both preferred the vodka slush. They are a bit much around $9.50 or so and not very big.