No. I am afraid not. Only one image can be displayed at a time by seting DisplayMode to mdSingle and then by seting PlayLoop to True to continuously loop playback of animated GIF and AVI files.
ImageEnMView can only load one animated gif at a time. Each of the thumbnails represent one frame of the gif. ImageEnMView can not display multiple animated gif files at a time.
You could only do it by adding each GIF as a thumbnail, refreshing the TImageEnView at the animation speed and manually loading the next gif frame into each thumbnail.