The Hornets thrashed Cardiff 5-1 on Friday night.
Gracia said: "There was four games before I think when I showed that we are the team with most clear chances missed and then we were creating chances.
"Today Gerard had two one-v-one with the keeper and scored, in other games maybe he didn't.
"It's the difference in between one game and others. I'm very proud of all my players because, as I said, all of them are showing their quality, their commitment and I'm very happy for the supporters."