No picture. However, a three-piece panel set will not give any strength. They are used on simple doors like cabinets. Not being able to see what the problem is it's difficult to answer. But a garage door takes a lot of stress. If the structure is still intact and all you are doing is trying to hold a small panel or piece of glass in place then all you would need to do would be to cut an outside profile on a board to match the door and hold it in place from the inside. A piece of wood on the back or pocket hole screws from the back would do the job. If you are trying to replace a section of the door that runs the complete length then it would be time to get a new door.