To see or pass through a gate in your dream suggests that you are walking through a new phase of life. It also represents new opportunities and possibilities, especially if the gate is opened or swinging.
To see a closed gate in your dream signifies your inability to overcome current difficulties. If you are unable to open the gate, then it indicates that your hard work will be seen as unsatisfactory. It may also mean that you are not ready or not prepared to move on to the next step.
To dream that you are climbing to the top of a gate suggests that you are trying to gain an upper hand on some situation. You want to know what is ahead for you before you commit to something. If you climb over the gate, then it means that you are looking for a shortcut in life. It may also refer to your impatience.