She has her own variables same as every other SG.
She doesn't have RP, just like every other SG.
The only difference is she gets a mini-episode (to compensate because she came in late), and she's a device for MC to stray off MG paths.
Eh, not RP per-se, I meant more the whole DIK/CHICK points that lead to her affinity... I just mispoke... and the "interest points" too, which determine if you get the choice to reject her or if it's automatic... anyways, the point being, she's no SG... in fact she's more akin to a secondary MC considering we the players can somewhat shape her personality. I think it's fairly obvious she's a MG, but she functions a bit differently from the other 5.
FWIW tho, I do think a few of SGs could get an offical MG status in S4, like Quinn, Lily and maybe Nicole and a few others that turned out to be super popular... or maybe not, it will probably depend on how much work it takes... but I'm fairly certain Zoey's getting her own main branch.