The proposed merger between the Scottish Football League and Scottish Premier League, which would see the two top divisions split into three groups of eight after 22 games, could be implemented as soon as next season, with both sets of clubs voting on it at the end of January.
But Green told RangersTV: "If this does happen what is the point of us finishing the season? Why should we send players out to get broken noses - like Ross Perry last week - or have players getting surgery when no-one can get promoted and no-one can get relegated.
"We might as well have a winter break now til next August. I can't see any point in carrying on with meaningless matches.
"In what league do you win a division and then end up playing the same teams again the following season? There is no meaning to it, in reality.
"My advice to the board of Rangers is the quicker we can leave Scottish football the better. I can't see anything that is going to transform the finances, the status or the excitement.
"On first glance, of course, there is nowhere for us to go because FIFA have made their feelings known on cross-border leagues.
"Hand on heart today there isn't an option but that doesn't mean we shouldn't start looking for an option."