G is my wonderful husband, an ever patient ever kind man. I'm incredibly lucky to have found him and even luckier that I get to keep him.
G is also for guilt: I'm guilty of writing three letter-posts in one day to catch up on the blogfest!
Grá is the Irish word for love and how appropriate for today, dedicated to G my 'fíorghrá' - 'truelove'.
Gauss wrote 'Disquisitiones Arithmeticae' and many other important works. A pre-eminent mathematician there is too much to say about him so I will direct you to a biography. There is also Galois, who by his death at the age 20 had already begun the investigation of an entire new area of maths, Galois Theory.