The altercation happened with 10:48 left in the second quarter of the Bucks' 151-135 loss Monday night. Ivey was barred from the Bucks' season finale against Minnesota on Wednesday and the first two regular-season games he is eligible to play next season.
"It was nice to see, because [executive vice president of basketball operations John Paxson] was calling," Gray said. "It's obvious I had support from the organization and the NBA."
Ivey, who has averaged 5.6 points per game this season, was with the team at the morning shootaround. The news didn't emerge until the afternoon, and coach Larry Krystkowiak sounded surprised.
"Something took place, they reviewed the film, and made the decision at the league," Krystkowiak said. "Beyond that, I haven't had a chance to talk to Ive. Just knew that he wasn't supposed to join us coming to the gym, and we're going to catch up with him on the plane on the way home."
Milwaukee (26-55) is last in the Central Division.
Information from The Associated Press and Reuters were used in this report.