The gallery was never someplace regular members like us could post pictures, it was only available to admins (and maybe moderators) Tended to have pictures from SEMA shows that had Vibes, or some the early genvibe mega meets. Some of the gallery images can still be viewed if you find the right snapshot at https://web.archive.org/web/*/genvibe.com
My preference for pictures to be referenced in forum posts is to upload the pictures to the thread, using the attachments tab under the general test area when writing a post. There is a file size limit, and since modern digital cameras take huge pictures, you have to resize or crop the pictures to get the file size under the limit, and this is trouble for some people. However, there are a lot of previously really useful threads here that no longer have pictures because the originator hosted them off site, and over the years lost interest and stopped hosting them , now they're gone forever. So far, images uploaded seem to still be here, even from members who are long gone.
Although, there was a forum software update that at one point shuffled some uploaded pictures. The uploaded pictures are still here if you know where to look, but some of the links got messed up. Ragingfish, a severely prolific and fearless member who isn't here anymore wrote up a ton of how-to's, but since he used external image hosting, those pics are lost to the ether.