Psychology is considered a social science/humanities type of class. Although your question is dependent on each school in determining science courses, I would say no to your question. Psychology is in the league of sociology, economics, political science, etc, and not in the league of chemistry, biology, physics, etc. The latter group is usually refered to as the "natural" sciences.
You may want to check with each school, but I'll bet all of Vegas's money that Psych will NOT be considered in science GPA calculations at any school. Let me know if I'm wrong.