Two days in advance, make banner. Roll out gum paste to 1/8 in. thickness. Using craft knife and hand-drawn pattern, cut out banner shape. Dry flat, face down, on cornstarch-covered surface.
Prepare gum glue adhesive following recipe instructions. Using gum glue, attach lollipop sticks to back of banner. Let dry, face down, for 1 to 2 days.