The striker faces a nervous wait to learn whether an FA investigation into an alleged betting ban breach will cost him a place in Qatar.
It emerged over the weekend that Toney is subject to an ongoing inquiry as Gareth Southgate prepares to name his 26-man squad on Thursday.
According to the Mail on Sunday, the investigation relates to a period more than two years ago before he joined Brentford and did not involve betting on his own team to lose.
Toney released a statement on Saturday confirming he was helping the FA with its investigation and saying it was a “childhood dream” to represent England at a World Cup.
He was suspended for Brentford’s 2-2 draw at Nottingham Forest on Saturday but he will return to the team against Gillingham.
Bees manager Thomas Frank said: “Ivan will start the game. He is fighting for his position in the World Cup squad.
“Of course, he is hoping to be called up. I have spoken many times, I think he will be a perfect fit for two reasons… one, his qualities and, two, his specialist role, both as a striker coming off the bench and hopefully making a difference if they need a goal in their game. And, of course, with the penalties as well.”