CopyGradients is an online tool that will enable you to easily copy gradients to your clipboard then paste the code on Gutenberg editor or any application. You can also generate your own gradients using the builder provided.
To easily copy and paste gradients on WordPress just install the EditorsKit Plugin↗ which is available for free. With EditorsKit, you can enable the copy & paste controls on the block that supports gradient like button and cover blocks.
Made by Jeffrey Carandang↗ - creator of EditorsKit plugin for WordPress.