I think this is how it works:
Draw each image of your animation in an individual frame. You can even specify timings for the animated frames. Save your work in .gal format. Then you can do one of two things.
1) Export your animation as a combined file. You can also click on "Output to CSV" to save your animation timing data to a text file. Then load the file you saved and save it as a PNG or whatever graphics format you like. Then, you can load that image file into Dark Basic (Pro) and use "Get Image" or "Create Animated Sprite" to cut it up into individual images in order to create your animation.
2) The second method involves exporting your animated frames as individual images from Gale(I recommend using PNG and selecting to save the Alpha channel). Again, you can save you animation timings to a text file (.CSV) if you want. Then you can load each of these images into Dark Basic and piece together you animation that way.

He's evil, but, he'll die. I like it.