Adding GTID in active percona cluster

Hi

Is it possible to add GTID functionality in active and running percona cluster?

Initially claster was setup with gtid_mode=OFF.
Is there some way to activate GTID in this cluster (preferrable online). All my attempts to do so (sequetially switching on gtid_mode to OFF_PERMISSIVE/ON_PERMISSIVE/ON on all cluster nodes) result in different gtid_executed on all cluster nodes (and different GTIDs for same transaction in binlog on different servers).

Maybe someone can provide exact steps to correctly introduce GTIDs in running cluster?

Thank you