Gray, a late withdrawal from the weekend loss to Carlton with a thigh injury, wasn't sighted at Port's Monday session.
But coach Ken Hinkley said the elusive forward will definitely play against the Magpies as Port return to the finals for the first time since 2007.
Gray will be recalled with Hamish Hartlett, who has served a two-match ban, and defender Alipate Carlile, who will return from a back ailment for a duel with Magpie man mountain Travis Cloke.
Hinkley says finding players to drop for the returning trio will be difficult but shrugged off Port's lack of finals experience as a factor.
"I don't think it's much," he told reporters on Monday.
"Everyone will say that it's some sort of concern at some point. But you have got to start getting that finals experience.
"I think back to 2004 at Geelong - there wasn't much finals experience in the team either."
Hinkley has just two players unavailable - injured ruckman Jarrad Redden and retired Brett Ebert - and has told his players to embrace the finals feeling.
"There will be a bit more pressure on at the start but once the game gets going, it tends to settle down into a pretty normal game of football," he said.
Port downed the Magpies by 35 points at AAMI Stadium in round 14, their only meeting this season, and captain Travis Boak said the Power deserved to their return to the finals.
"It has been a pretty challenging four or five years," Boak told reporters on Monday.
"But I think sometimes you need to learn how to get there ... what we have learnt over the last four or five years is how much work and effort you need to put in.
"I would have loved it to happen quicker. But we have learnt what it takes to get here and hopefully that helps us now."
