The 25-year-old claims that he was standing up for his teammate Laurent Koscielny against Costa's bullying tactics and insists he would do the same again if the opportunity arose.
"That's how I am," Gabriel said in an interview with the Daily Mail.
"I will always stand up for the ones I love.
"We have affection for our team mates because we spend most of our time with them. Sometimes we spend more time with our team-mates than our families. This is my instinct I always stand up for my teammates.
"For me, the red card was a surprise but I learned from that experience. I won't change.
"That's how I react in these situations but I learned and I will defend my teammates but in another way — not doing what I did."