it’s 24 seconds but you can technically slow it down to 10% so it’s really 240 seconds WITHOUT pro
it can also go further if you use the gif maker via frames of a video (see
imgflip.com/gif/a21chl#com37393206 on how to do it). the maximum delay is 1 second per frame, and the maximum frame count is 1600 for non-pro users, so the slowest a gif can go without pro is 1600 seconds. I don’t know the maximum frames with pro users, but I’m assuming you DONT have pro, so I won’t mention it.
There’s also the fact that you can manipulate the speed of a regular gif to 1%, so it’s really 2400 seconds, and I’m assuming the same works for the frame delay too. If it doesn’t, let me know.