Gamma Control: Launch at Login
The new version 6.1 of Gamma Control released today has one new feature: a checkbox to automatically launch at login. It was possible to launch Gamma Control at login earlier by adding it to the login items in System Preferences, but this is not very reliable on modern versions of macOS.
By making the feature part of the app, this should work better. In particular, with this checked, the app will not fall into a sort of zombie state where it looks open but it’s just the system lying to you in order to save ressources used by apps that have no window open.
Version 6.1 is a free update for users of version 6.0. Customers with a branded version can request an update to the customized app.