Well for me the gif search is broken, which wasn't the case on Android 7 (note8). Now get around it I have to set the Samsung keyboard to floating for the gif search to not disappear
Mine disappeared at some point and I had to go under... which was not easy to find keyboard layout and feedback under settings and turn on my keyboard toolbar. Gif is back up and running
Ok. i found a solution. In the messaging app, where you type the text, click the + button to the LEFT. This brings up a window with stuff like "Gallery" "Places" "Collage" etc. Click "search". Then type whatever you're looking for like "duh" and hit "SEARCH". The results will come up with "Images" "video" and "Gifs". Select Gifs and find your gif. Click ATTACH, and it pops it into the text. YAYA!!!!
Still doesn't work for me on my S7.Noplace to search for gifs, just pre-selected topics. I have read every post in this thread, none of them work. WTF Samsung? ***** shame I have to download another app on my already overflowing memory to do this.