Pressure has been mounting on Gray for some time, with his side now on a run of one win in 12. And that intensified when St Mirren took the lead
McMenamin ghosted in at the front post for his first goal, meeting a smart Scott Tanser cross, and seemed to wrong-foot Hibs keeper Josef Bursik for the second.
The stopper fell to his right and McMenamin’s strike was driven in low to the left, nicking off the keeper on the way in.
The maligned Elie Youan tried his best to be a nuisance to St Mirren’s central defenders, twisting and turning on the edge of the area before rattling a strike off of the post.
Despite a triple change at the interval, Hibs were unable to fight their way back into the game.
Boyle's penalty was struck low to the left but not near enough to the corner, with Balcombe able to get down and smother it.
St Mirren didn't attack in the second half with as much threat as the first period, and Cadden's late spot-kick almost kick-started a sensational comeback.
His strike moments later beat the stretching Balcombe but Gayle was clearly offside, meaning the effort was predictably ruled out after a VAR check.