The Brazilian striker opened the scoring at Selhurst Park, netting his 50th goal for the Club with a diving header and two minutes later David Silva finished a fine team move with a sweetly struck volley.
"We played well," Gabriel said.
"With and without the ball, that is great for us. Bernardo's cross was amazing, I am happy because I tried two or three times before to score.
"It is always difficult to play against Crystal Palace. We have to pass the ball all the time to try and score. They have good players.
"It is not just about this [game]. We have to do it all the time - thinking about winning. Of course, we can't always win. Sometimes football is like this and now is the time to come back strong."