Greyhound Cocktail

"Greyhound Drink: Super refreshing with just the right amount of tartness. Perfect for brunch! Can you ever go wrong with a gin and juice combo?  The greyhound drink is a refreshing, easy cocktail for any time of the year. What is a greyhound cocktail, you may ask? It is one of the simplest drinks, but tastes amazing! I like it as is, but you can certainly add some simple syrup to sweeten it up if you'd prefer. P.S. The grapefruit juice makes it appropriate for breakfast right?!"