Hi @EnterpriseArchitect ,
- Task Scheduler account => GMSA is supported
- Failover Cluster => is not supported : Group Managed Service Accounts Overview
- SQL Server => GMSA is supported
- ADFS => GMSA is supported : Creating an AD FS Farm without domain admin privileges
- Azure AD Connect => you can use GMSA , I alreday use it in my infra
- DHCP => GMSA is not supported
Please don't forget to mark helpful answer as accepted