"The Chris Gayle issue has been going on for a while. But we as a team have moved on. When Chris joins the set-up, he will be coming into a very hard-working environment - which he has to fit into," Sammy was quoted as saying by Sports24.
Sammy hoped the explosive batsman could settle down well and boost West Indies cricket.
"We all know what he is capable of doing, and we hope he could fit in nicely and do the job to take West Indies cricket forward," he added.
Windies coach Ottis Gibson was ecstatic about Gayle's return to the squad and termed him as the best ODI batsman in the world. Gibson was confident Gayle would be selected for the ODI series against England.
He said: "It's great to hear that Chris is available again. I'm sure the selectors will pick him, because he's world-class...He's the best one-day batsman in the world."
Gayle, who has not featured for the national side since the World Cup in March, decided to end his turmoil with WICB (West Indies Cricket Board) and would make himself available for the national team in all formats.
Controversy sparked off when the former Windies skipper had made critical comments about board officials.
The 32-year-old left-hander, who represents Royal Challengers Bangalore in IPL season 5, scrapped his contract with the English county side Somerset, to free himself to play for the West Indies, even though they were no guarantees about his selection.
But though Gayle was not chosen for the three-Test series against England starting on May 17, he could eye the following one-day series which begins in Southampton on June 16.