Is Red Dead Redemption appropriate for a 13 year old

IF you turn gore off i cannot why a reason why it is inappropriate, there are several counts of swearing but they are rare to find. However, there is a scene where you see a womans breasts for a few seconds but you are able to skip the cutscene, you can also turn off blood and gore so the enemies only fall when they get shot, there is also gambling and drinking but no use of drugs, personally i would give the game a 15 rating but it is the parents choice, not mine :)