In a large bowl, stir togther watermelon, sugar, and lime juice. Refrigerate until cold, about 30 minutes.
In a small saucepan, cook ½ cup water and gelatin over low heat, stirring constantly, until dissolved, 3 to 5 minutes.
Working in batches, pulse watermelon mixture in the container of a blender until smooth. Add corn syrup and gelatin mixture; pulse to combine.
In a large bowl, stir together milk and watermelon mixture until well combined.
Pour mixture into the container of an electric ice cream maker, and freeze according to manufacturer’s instructions. Transfer to a 2-quart container, and freeze until very firm, about 4 hours. Serve with watermelon wedges, if desired.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/watermelon-sherbet-2-recipe/