Assuming you have a lot of units from all the classes you have taken and you have a GPA around 3.5, a quarter's worth of units at a 4.0 would only increase your GPA marginally. You need many quarters at a 4.0 to make a notable difference. I doubt schools would look into that. However, if you have a lower GPA, a 4.0 would probably reflect well since it might show the upward trend in your GPAs, which you could explain in your personal statement, and it should boost your GPA more so.