I have a U.S. map to add to it, too. I figure that some people might be better with a color coded picture plus it might help with transporting gars through certain states. I'll try to get a world map done at some point, but the main legality questions seem to come from the U.S. more than any other country.
Green= Legal.
Brown= Possession of spotted gar (Lepisosteus oculatus), longnose gar (Lepisosteus osseus), and shortnose gar (Lepisosteus platostomus) is prohibited. The regulations do not mention the other gar species.
Purple= The regulations imply that possession of true gars is prohibited because there is a specific list of fishes that are allowed to be owned.
Red= Illegal.
Yellow= No information could be found.