It is expected that certain features, especially related to Remote PowerShell connectivity, will not function. Also using a gMSA for the SQL agent account in replication will not allow for merge replication functionality. This is an unsupported configuration.
For more information about using a gMSA as an Active Roles Administration Service service account, see the section titled Configuring gMSA as an Active Roles Service account
in the Active Roles Administration Guide