Dream about maternal grandfather is an omen for your growth. You need to concentrate on the more important things in life. There is something that you need to express and get out into the open. This dream is an omen for your persona and subconscious. An aspect of yourself is fighting to be expressed or let out.
Maternal grandfather dream is an indication for your sense of responsibility and duty. You are suppressing too much of your feelings that it is affecting your well-being. You are pretending to be something you are not. This hints your general dissatisfaction in your daily life. There is some message that you need to ingrain in your mind.
If you dreamt about maternal grandfather:
Someone is challenging your ideas in a very aggressive manner. This person is saying that your ideas are more based in fantasy than in reality. Perhaps this person has a point, but that does not mean you need to change your perspective.