Xbox Live Subscriptions

So my girlfriend and I have our own residence at University and we recently bought a 360 for entertainment and fun. We have some pals back in our hometown who have xbox live and urged us to get gold. Because my GF and I both have our own Gamertags, will we need just 2 subscription to live or just 1 if we both want to play on live?

Thanks in advance :D

Interesting. Thanks alot.

It kinda sucks having to pay for 2 though :(

Damn you microsoft lol.