He's a class player, he'd certainly improve your team. The mods on the Wigan board are terrified of being sued for libel so I've no idea what has actually gone on.
The rumours on twitter have certainly been eye opening. Whether they're true I don't know. Gleeson has certainly been in trouble with Maguire before though - whether this is the straw that broke the camel's back, or whether it's a very serious offence I don't know. I'm not sure we'll ever know.