http://guitarpatches.com/patches.php?unit=GT1
http://bosstonecentral.com/liveset/category/gt-1/
(https://s6.postimg.cc/pdokaqoe9/GT1_patches.png)
Josh Munday has a site:
http://guitarfxpatches.com
Choptones:
http://choptones.net/boss-patches/gt1-patches
Have you tried https://bosstoneexchange.com/ ?
https://bosstoneexchange.com/gear/gt-1/?keyword=&gear=gt-1&view=block&sort=-createDate&from=1&size=24&tag=