PowerPoint for iPad now supports exporting slideshows in GIF format. Previously, this feature was limited to Mac and Windows.
Creating animated GIFs with PowerPoint is easy. On your PC or Mac, open your presentation and navigate to File > Export > Create Animated GIFs.
On the iPad you will need to open the desired presentation and then click on the File menu (three-dot view) to reveal the Create GIF option. Next, you can specify which slides, how long each slide should be displayed and the quality of the animated GIF to be exported.