McGowan missed the midweek defeat by Scottish Premiership leaders Celtic under the terms of his court-imposed curfew following an assault conviction.
Dundee boss Paul Hartley will assess defender Gary Irvine (knee) and midfielder Gary Harkins (shin) before the match.
Hartley’s side are hoping to move within a point of their visitors as they look to finish abouve both St Johnstone and Dundee United in fourth place.
St Johnstone are definitely without two players when they make the trip to Dens Park to play the Dark Blues.
Defender Steven Anderson and midfielder Simon Lappin are suspended for the first of the post-split top six fixtures.
But Saints manager Tommy Wright could have three other players available as they look for a second win in eight days against their opponents.
Defenders Frazer Wright and Brian Easton sustained knocks in last week’s win at McDiarmid Park, while Murray Davidson has missed the last two games, but all returned to training on Thursday.