May be you should try other formats. WebP is a bit like GIF but the frames can be lossly compressed as with JPEGs. It is supported in Gimp 2.10 and support by all browsers. The final result can be much smaller. There is also its cousin the WebM format, which is more video-like.
AFAIK Gify transforms the animation in video anyway.
PS: For 1.5GB I can have a 720p copy of any StarWars epidsode.
AFAIK Gify transforms the animation in video anyway.
PS: For 1.5GB I can have a 720p copy of any StarWars epidsode.