Open TikTok and go to the video you want to comment on
Tap the comment icon
Tap the text box to open the keyboard
Tap the GIF button if it appears on your keyboard or comment toolbar
Search for the GIF you want
Tap the GIF to insert it into your comment
Post the comment
If no GIF option appears, update TikTok and your keyboard app
If GIF comments are not supported on your device or region, use text or emoji instead