  In this paper we introduce and study the notion of a graded (strongly) nil
clean ring which is group graded. We also deal with extensions of graded
(strongly) nil clean rings to graded matrix rings and to graded group rings.
The question of when nil cleanness of the component, which corresponds to the
neutral element of a group, implies graded nil cleanness of the whole graded
ring is examined. Similar question is discussed in the case of groupoid graded
rings as well.
