Thanks for asking question!
Deploy container instances that use GPU resources are still in Preview limitations.
Suggested to provide Container product feedback in the below URL.
https://feedback.azure.com/forums/602224-azure-container-instances
Please watch Roadmap updates for feature releases.
https://azure.microsoft.com/en-us/updates/
Supported OS types: Linux only
Additional limitations: GPU resources can't be used when deploying a container group into a virtual network.
----------
Please don’t forget to "Accept the answer" and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.