The WWE star, whose real name is Daria Berenato, 29, was cooperating with police, who were called to the Borgata Hotel on Feb. 19, Atlantic City police said.
"Berenato admitted to being the owner of the handgun and provided responding officers a permit to carry from out of state that is not valid in New Jersey," the ACPD said.
The WWE star was charged with unlawful possession of a weapon, and released on a summons pending a future court date.
Deville, a Shamong native who lives in Florida, got engaged to her girlfriend Toni Cassano just four days earlier in Towaco, as reported by PEOPLE.
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