Can you see any reference to Ruby here?
They even have an ObjectiveC library, probably cause of the huge amount of Objective C web frameworks, but no official Ruby library.
Do they hate Ruby? Please, do not hate Ruby! I’m a poor little interpreted language used by everyone who is making real money, please love me! pleaseeeee, I’ll make you rich!
Yeah, ok, I’m sarcastic and there obviously are some unofficial Ruby libraries around there for GData.