Looks like Gildart picked the wrong time and the wrong team for his opportunity in the NRL, although timing is probably down to bad luck due to his injuries.
In previous years he'd been really good for Wigan, but last season with the persistent injuries his form completely fell away. He'd been a relatively solid defender, and always seemed to defend well on the occasions he came up against good opposition, but last year his defence was absolutely awful. The drop in standard was pretty shocking. Still showed a bit of class in attack at times but even that side of his game was inconsistent.
To be going to the NRL on the back of some of the worst performances of his career and going to a team that is a bit of a shambles has put him on something of a hiding to nothing. Even in his very best form there were obviously aspects of his game that would need improving (his aerial ability is suspect for a league of 6 foot + super athletes) but anything below that form and it's hard to see anything other than him returning home early and signing for Wire next year.