The prohibition of faster than light travel (or communication) in GR only applies locally. That is to say, it really should be phrased as "two observers can not

The prohibition of faster than light travel (or communication) in GR only applies locally. That is to say, it really should be phrased as "two observers can not have a relative speed faster than c at the same point." If you're not talking about the same point of space, the space between the observers could be expanding and the rate of this expansion can legitimately be faster than c without violating the relativity principle. The trick to creating genuine FTL travel or communication is to somehow multiple paths between the same points in spacetime -- i.e. a wormhole. If the new path is shorter than the other, then information can travel along it at a speed less than c, but still take less time than light going the long way. Quantum entanglement whole different game. Once a measurement has been made, the entanglement is broken and the components are left in a particular state. But, while the observer that did the measurement knows the state of the other component, they can only convey that information via regular, light speed, communication.