I'm thinking a 2024 2nd + 4th, or something along those lines would be enough. Maybe just the 2nd if we're lucky.
Supposedly the Canucks are struggling to off-load Garland, which is a great comparable with identical cap hit and being a natural winger. Except in his case, he's a younger, much faster, much better player than MG and could easily be worth his cap hit next year.
It's hard to imagine no sweeteners at all are required for MG, especially with the 2nd year he's got. I would give great praise to Dubas for swinging that.