if they terminated G's contract, there would be compensation to pay (unless G's contract is different to every other sports coach out there), that compensation i would suggest would be at least the same as his comparative salary to the end of the season.
the only remotely likely chance we would have for a replacement now would be if G resigned, and with respect, no pro-hockey player/coach is going to forego their pay during the regular season, however much pressure they may be under. This sport does not have the luxury of being able to go through coaches, like it or not, the ball is in G's corner, and the club can't do anything about it.