That sounds about right for 3 year old GTs to me -- both my boys were doing 1 to 1 correspondence while still in diapers. So, I'd say yes to that being GT because teachers made such a big deal about it in their preschool classes -- as in "did you know he can make a train and touch and count each car?" (us: "uh, yes, of course we know that - he's out kid")
I think one-to-one correspondence develops before K -- I think this was part of the K readiness testing in our system. (Of course my DS was very worried about the K test because he thought they'd want him to know his times tables and he was still struggling with the 7s). The teacher was quick to reassure him!
