In the text box where you create your posts here in HawkeyeReport, there should be a button with a square, a couple mountains, and a sun on it (it’s next to the two looped ovals hyperlink button, and in the same area as the “bold” option, which you are familiar with). Click on the square button and there is a prompt to put in a link. Copy the link to the gif and paste it in that text box and the gif should show up in the reply area
Note: the link you paste has to end in .gif for it to show up. It’s easy to post the link to the website that the gif is on versus the gif itself. A lot of times, holding your finger on the gif (in google or giphy or wherever) and clicking “Open image in a new tab” will ensure you are solely opening the gif instead of just going to the page the gif is on