A gravity wave only interacts gravitionally right? And the energy it contains exerts a pull of its own? Say could you prevent one from escaping to infinity? Sta

A gravity wave only interacts gravitionally right? And the energy it contains exerts a pull of its own? Say could you prevent one from escaping to infinity? Standing wave? Make it orbit something? And I suppose even if it does escape to infinity it would be interesting to know if there is an analogue of the cosmic microwave background.