"Hannover has requested that the North German soccer association open an investigation into the racist insults during the Regionaliga game of our U-23s against VfB Lübeck," Hannover 96 announced.
Insults by a group of 200 Lübeck visiting fans at the game attended by 1,200 included yelling "Affe" (monkey) at the young American, according to Hannover's official web site.
"Chris was sitting in the locker room with tears in his eyes after the final whistle," said Michael Tarnat, Hannover 96's academy director. "He was constantly and severely insulted during the game."
Gloster, who started at left back in the 1-1 tie, was making his 13th German fourth division appearance with the Bundesliga club.
A USA starter during its Concacaf U-20 Championship title win while qualifying for the U-20 World Cup that kicks off in May, Gloster spoke on the The Scuffed Podcast after the incident:
"It was a free kick so I was walking away from the ball and then I heard the fans on the opposing team making monkey noises and calling me the n word. At first I didn't really know what to think ... I was really shocked. I didn't know how to react, because it was my first experience ... My teammates really helped me through it on the field and in the locker room. The team we were playing against, even their players were comforting me, helping me through it as well. It was a really shocking experience for me.
"I just have to keep my head up and I really appreciate everyone's support as well."