Yes, giro is a Scrabble word!
...and is worth 5 points in Scrabble, and 6 points in Words with Friends
giro
Noun
1. A check given by the British government to someone who is unemployed; it can be cashed either at a bank or at the post office
2. A British financial system in which a bank or a post office transfers money from one account to another when they receive authorization to do so
What Scrabble words can I make with the letters in giro?
3 Letter Words
2 Letter Words