To make Citrus Eclipse (first six ingredients listed above):
Spread sugar on a small flat plate. Wet rim of glass with a bit of grapefruit juice. Turn glass upside down and dip rim in sugar. Place ice in cocktail shaker. Pour gin, grapefruit juice, and orange bitters over ice, cover with lid, and shake vigorously for 20 seconds. Strain cocktail into glass. Make a small cut through the orange slice and slide upright on the edge of the glass for garnish.
To make Pucker Up! (last seven ingredients listed above):
Place ice in cocktail shaker. Pour gin, grapefruit juice, lemon juice, Grand Marnier, and orange bitters over ice, cover with lid, and shake vigorously for 20 seconds. Strain cocktail into glass. Hook the lemon peel over the rim of the glass.
