Gabriel was charged by the ICC on Tuesday after he was warned by the on-field umpires in the third Test in St Lucia for comments made towards Root.
At the time of the West Indies' squad being announced, chairman of selectors Courtney Browne said: "Shannon Gabriel remains very much in our World Cup plans but with a heavy workload expected in the Test series he will be considered for selection later in the ODI series".
West Indies' captain Kraigg Brathwaite, second from left, leads bowler Shannon Gabriel during a tense day's play in the third cricket test at St Lucia.
The ICC did not stipulate what Gabriel said to Root, nor did stump microphones pick up his comments but according media reports, Root was overheard telling Gabriel in response: "Don't use it as an insult. There is nothing wrong with being gay".
Joe Root responds to sledging from Windies bowler Shannon Gabriel.
"The charge, which was laid by match umpires, will now be dealt with by Match Referee Jeff Crowe", the ICC said in a statement.
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Inspired by a Mark Wood spell which knocked over the hosts for 154, Joe Root and men are now in a commanding position.
"Don't use it as an insult", Root added.
Root was commended for his on-field remarks by Stonewall's director of sport Kirsty Clarke, who told PinkNews: "Tackling offensive language is a crucial part of helping LGBT people feel welcome in sport. The battle was a good contest". "I don't want anything said in the middle to ruin what's been a good test series for him and his team".
"Nothing has been reported to me but if a comment was made we will review it". Which is exactly what England captain Joe Root did.
Former England wicketkeeper Steven Davies, who came out as gay in 2011, wrote on Twitter: "There is no room in the game for any form of discrimination...."
Nasser Hussein, the ex-England captain, also paid tribute to Root by tweeting: "I don't know who said what to whom. but boy do I applaud Joe Root's reaction here".
There was also praise for Root from global rugby referee Nigel Owens who came out in 2007.