It was an invasion of the commonwealth, flying in face of the express wishes of the Queen and Margaret Thatcher.
When a Governor calls for Commonwealth assistance and the USA invades, does that mean the USA has rejoined the commonwealth?
Only nine countries objected to the UN condemnation (Antigua and Barbuda, Barbados, Dominica, El Salvador, Israel, Jamaica, Saint Lucia, Saint Vincent, Grenada, and the United States*). While 122 voted in favour. United Nations General Assembly adopted General Assembly resolution 38/7 which "deeply deplores the armed intervention in Grenada, which constitutes a flagrant violation of international law and of the independence, sovereignty and territorial integrity of that State".
*Those that had conducted the invasion, plus Israel and El Salvador. Lap dogs.