Bug: gtid-mode broken in MySQL 8.0

Question

In MySQL 5.7 parameter groups, gtid-mode is modifiable.  However, in MySQL 8.0 parameter groups, there are two separate gtid-mode parameters: gtid-mode and gtid_mode.  Only one is modifiable, and it has no effect.  The one stuck on OFF is the one that takes effect.  
  
Edited by: PaulNamePros on Feb 11, 2019 6:22 PM

Answer

AWS support has responded that GTID mode isn't supported in 8.0 at the moment, per the note on  , emphasis mine:  
 >GTID-based replication is supported for Amazon RDS MySQL version 5.7.23 and later MySQL 5.7 versions. All Amazon RDS MySQL DB instances in a replication configuration must meet this requirement. GTID-based replication is not supported for Amazon RDS MySQL 5.5, 5.6, or **8.0**.  
  
Support wasn't able to provide info on when the feature might be available.  
  
Edited by: PaulNamePros on Feb 14, 2019 3:33 PM

Bug: gtid-mode broken in MySQL 8.0

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