qiskit/releasenotes/notes/0.16/deprecate-MSGate-class-40495351761c202f.yaml

---
deprecations:
  - |
    The :class:`qiskit.circuit.library.MSGate` class has been
    deprecated, but will remain in place to allow loading of old jobs. It has been replaced
    with the :class:`qiskit.circuit.library.GMS` class which should be used
    instead.