I have never seen this at a bar, restaurant, or in a number of very large cocktail recipe books I've looked at. I believe my wife and I invented this. We call it a Gin-Gin.
-Put a piece of candied ginger at the bottom of a frozen martini glass
-Fill the glass half way up wih good quality, cold ginger ale
-Fill the rest of the glass with gin that's been shaken with ice in a shaker
Is something anyone else has tried? I think it's fantastic.