  This paper deals with the graded commutative rings in which every homogeneous
prime ideal is contained in a unique homogeneous maximal ideal called Gelfand
graded ring. The purpose is to establish some topological and algebraic
characterizations of these rings, one of which is the algebraic analogue of the
Urysohn's lemma. Finally we look at a special class of those graded rings
called pm$^+$ graded rings which can be viewed as graded ring with a Gelfand
strong property.
