@turquoise-- Which economy course are you taking? It sounds like you're studying fiscal policy. I used to be a tutor for economy courses in graduate school. I know you got your answer, but I want to elaborate some more.
You don't have to think about the GDP gap as "good" or "bad." The GDP gap measures the difference between potential and equilibrium GDP. The fact that there is a GDP gap in the economy does not mean that the economy is not in equilibrium (in balance). It just means that the economy has potential for growth. In a way, the GDP gap shows economists how much growth (production) the economy should aim for to reach full potential.
An economy can be in balance while there is a GDP gap and while there is unemployment. In order for it to be in balance, it requires that the value of goods and services in the country be equal to real GDP. It also requires merchandise to remain the same and for lending and borrowing to be equal. These factors can exist while there is a GDP gap.
So an economy can be in equilibrium and in recession at the same time. A recession gap will exist as long as employment has not reached its full potential. The way that the GDP gap and the recession gap can be closed is to increase production. Production takes care of the unemployment problem and also eliminates or narrows the GDP gap.
Does that make sense?