Gnostism is based in fatalism.. like Islam.. and some Christian(works based) and Buddhist religious thought..
God(Judeo-christian god) is Spirit and those that worship him MUST worship in spirit and reality.. all other is flesh and movement/writhing of "the Worm"..
There is no such entirty as "Judeo-Christian" God. There is God, period. In His full revelation to man we know that he is one God in Three Persons. The Jews, Muslims, and Hindus don't know that.
God does not belong to Christians or Jews. Different rleigions have different "concepts" of God. Thus, we may say "Jewish concept of God," or "Christian concept of God, " etc. but not "Judeo-Christian" God.