ShareGate Migration displays the following warning:

The warning value for the storage quota is higher than the maximum storage quota. The warning will be disabled at the destination.

The warning value for the resource quota is higher than the maximum resource quota. The warning will be disabled at the destination.

When creating a site collection, SharePoint enforces the fact that the warning value must be lower than the maximum value for resource or storage quotas. If we detect that you have set a maximum resource quota smaller than the warning value at your source, we will create your site collection, but use the value "0" for the warning setting. This means the warning will be disabled at your destination.

We recommend that you update the values at your destination after the migration with the values that make sense for your new tenant.

To obtain or modify this value you can follow these steps:

Connect to your central admin, then navigate to Application Management. Under the Site Collections management options, click on Configure quotas and locks. You will be able to see and configure the quotas for your site collection there.

Connect to your central admin, then under the Site Collections menu, you will be able to search for your site collection and then, if you select it, you will be able to click on Server Resource Quota in the toolbar. You will be able to see and configure the quotas for your site collection there.