Cheshire Police confirmed they received a report of an assault at an address in Widnes on Saturday afternoon local time.
"A 29-year-old man was arrested on suspicion of wounding with intent," a police statement said.
"He was questioned by detectives and released on conditional bail and enquiries into the assault remain ongoing."
Warrington confirmed Gelling was the subject of a club investigation into his "conduct away from the club" and would not be available for selection until the investigation is complete.