There are a few ways to remove gum from car mats. The most common is to use a plunger. Put the plunger over the gum and push and pull until the gum pops out. Another way is to use a vacuum cleaner with the hose attachment. Put the vacuum cleaner over the gum and turn it on. The suction will pull the gum out.
How do you get melted gum out of car carpet?