@AmigaBlitter

How can i change the text of the label later?

Labels are images, not gadgets. BOOPSI images are normally "fixed content", so if you plan to modify the label text later, you may be better off making it a button.gadget instead, with BUTTON_BevelStyle set to BVS_NONE (this will draw an "invisible" button, i.e. one without a box). Then you can easily change the text via SetGadgetAttrs(). Alternately (DISCLAIMER: never tried this solution in my own code so it's just theory), if you want/need to stay with a label.image, you can try calling the IM_ERASE method (thus erasing the current label), setting a new LABEL_Text via SetAttrs(), and then calling the IM_DRAW method upon the image object. As labels are not gadgets, you need to handle the erasing and redrawing all yourself.

GA_ID, GID_LABEL,

This line will have no effect. As the GA_ prefix implies, this is a gadget attribute so it only applies to gadget objects, whereas you're defining an image object here. Images need no IDs.