Where does unallocated live?

When I look at my accounts tab, my GB figures all agree with my bank. However, a portion of those totals is unallocated in my envelopes tab. In which account does my unallocated reside? Does that make sense?

It doesn’t live in any one account; it’s the aggregate amount of all the money in your accounts minus the amount you allocated to envelopes (whether or not you’ve spent it). If you have a savings account, it’s a good idea to create and fill a savings envelope to match so that money doesn’t look like it’s available to spend.
Hope that helps!