Gildart and Hardaker set to start for GB against Tonga


But George Williams looks set to miss out - to his replacement at the Warriors, Jackson Hastings.
The Australian-born Hastings is at halfback alongside Gareth Widdop in the 21-man squad, which will be trimmed to 19 on Friday, the day before the game.
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Hide AdHardaker played just one game for Wigan at centre this year, against Salford, but has been preferred to Hull FC's Jake Connor.
The 21-man squad suggests Wayne Bennett's line-up but he will be able to shuffle the ranks before kick-off if he chooses.
Kick-off on Friday is 8am UK time.
Great Britain squad: Coote (St Helens); McGillvary (Huddersfield), Hardaker (Wigan), Gildart (Wigan), Hall (Sydney Roosters); Widdop (St George Illawarra), Hastings (Salford); Hill (Warrington), Hodgson (Canberra), Thompson (St Helens), Bateman (Canberra), Whitehead (Canberra), Graham (St George Illawarra, capt). Subs: Jones (Salford), T Burgess (Souths), Lomax (St Helens), Walmsley (St Helens). Reserves: Connor (Hull FC), Hughes (Warrington), Williams (Wigan), Clark (Warrington).