Thanks for all the comments and advice on this thread. Although my 12 year old is a perfectly level headed kid and very unlikely to be turned into a monster by playing GTA our decision is NO - HE CAN HAVE IT WHEN HE IS A BIT OLDER IF HE IS STILL INTERESTED. Thanks again
What advice would NSC members give to a parent who is being asked by his 12 year old (soon to be 13) that he wants GTA for his birthday. He already plays Just Cause 4.