In GPL, many times products are preactivated and you don’t need any licenses. Yet, in many cases, we have provided the license on the product page itself under the activation tab. You just need to check the description area.
Here is an example – License key for Content Egg Pro Plugin
You can also check the Note tab in the description area for special activation and installation instructions. We add a notes and instructions tab if we think that any information or special instruction would be needed in order to help you with a smooth demo installation process.
Here is a good example of it – Porto Theme Notes Section
