I don t think they would touch Gallagher even with Myers because the key challenge is Pettersson s next contract next year. Myers is off the book at the end of the season, so he is not really a problem. Myers is similar to Armia : really like when he is on but he is off most nights
Garland is a 2nd / 3rd line player. He produced close to 50 points last year, 50 the year before so on average he is not overpaid : he is in line with the rule of thumb 1M for 10 points scored. The only issue I have seen with Garland is that he is small so he loses board battles and struggles against big Dmen in front of the net. However he is a fighter On the ice, has a bulldog mentality and is not a defensive liability.
The fact they want to move him has more to do with not being able to move on from Boeser than anything else. They just think he is behind Boeser Kuzmenko Mikheyev on the depth chart, and similar to Beauvillier but with higher AAV and shorter term. I am not sure management will trade him at all cost. (Or rather I hope not but VAN management is quite bad) The logical thing would be to let him play his season. Look at how much cap space they need for next year and then trade one of him or Boeser (who will only have one year left) if need be.