Install
This is the repository archive. It installs, but the folder name will carry the branch suffix and updates will not flow.
Install straight from GitHub with WP-CLI:
wp plugin install https://github.com/electricstudio/gravityforms-worldpay/archive/refs/heads/master.zipUpdates itself. It ships its own updater, so new versions appear under Dashboard → Updates.
Gravity forms Worldpay gateway
This was a client project that we're open sourcing. It has limited functionality, but you can hook up your worldpay account and start collecting money through Gravity Forms.
It only supports one-off fees, and there are a few limitations on the code base. I've modeled it after the authorize.net gateway