Doors Of A Gate, Gate Doors
noun
A gate's front door is the doors of a gate or gate doors.
もんぴ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own. Watch out for the rendaku.
私が門扉の前で待っていると、誰かが割り込んできました。
When I was waiting in front of the gate doors someone cut in front of me.