Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You didn't learn that reading with this kanji, so here's a mnemonic to help you: You fold your obi (お) really carefully and put it away with the rest of your kimono.
Please fold the gyoza skin over and make pleats.
When I was folding origami at the cafe a girl approached me.
When I was folding the paper I got a paper cut.