Good news! You should be able to remove any gunk without damaging your vehicle.
First, wash the area with soap and water to remove dirt and debris in the area. This is important to prevent any scratches in the later steps. Next, use a hairdryer to warm the area, making the glue more pliable and easier to work with. Once it is soft, gently slide a rubber scraper or plastic card under the glue, placing the card at a 45-degree angle against the car. You may have to reheat the area.
Finally, wash and wax the area to re-seal and protect your car’s paint.