In a small saucepan, bring the water and sugar to a simmer. Stir until sugar dissolves. Add lemon peel. Chill.
In a large clear glass pitcher, toss in all the sliced fruit - cherries, plums, nectarines and berries.
Pour the entire bottle of Rosé on top of the fruit. Add in the lemon juice and Grand Marnier. Gently stir in the chilled simple syrup, removing the lemon peel.
Chill the mixture at least 2 hours or preferably overnight.
Serve in chilled wine glasses or double over fashioned glasses over ice spooning the wine infused fruit into each drink. Garnish with mint.