@StephanG, Thanks for posting in Q&A. From your description, i know you want migrate GPOs to Intune policies. Based as I know, you can use Group Policy Analytics, import your GPOs, it will analyze your imported GPOs, and shows the settings that are also available in Microsoft Intune. For the settings that are available, you can create a Settings Catalog policy, and then deploy the policy to your managed devices. Here is a link with more details for yoru reference:
https://video2.skills-academy.com/en-us/mem/intune/configuration/group-policy-analytics-migrate
Hope the above information can help.
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