He made his ATP Tour singles debut at the 2002 Open 13 tournament on hard courts in Marseilles, France.

Gicquel made his ATP Tour doubles main draw debut when he received a wild card entry into the 2005 French Open alongside compatriot Nicolas Devilder.

On November 6, 2006, he broke into the top 50 after reaching his first ATP Tour final in Lyon, where he was defeated by Richard Gasquet.

In a match during the 2007 Halle, Germany tournament, Gicquel was struck directly in the crotch by a 129 mph Benjamin Becker serve.

He went on to beat Becker, but spent most of the night vomiting and in pain due to swelling and was forced to retire in his next match versus Jarkko Nieminen.