Currently, gitlab-ce allows you to change the text and logos on the company login page for more information.
When editing, there was a discussion about the possibility of changing the icon.
If you need to make more aggressive changes, see below.
Old answer:
If you have no plans to upgrade gitlab (or do you mind repeating this process each time you upgrade), try the following:
Change the desired assets, path: / Wholesale / gitlab / built-in / service / gitlab rails / application / assets / images /
after that, clear the resource cache:
gitlab-rake assets: clean RAILS_ENV = production
and generate them (I had some permission errors with this, nothing chmod 777 could fix, just try returning them back to their original state)
gitlab-rake assets: precompile RAILS_ENV = production
and finally restart
sudo gitlab-ctl restart
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