You can bring your own IPv6 global unicast addresses (GUAs) to assign to a subnet's internal IPv6 address range.

You can bring your own IPv6 global unicast addresses (GUAs) to assign to a subnet's internal IPv6 address range. Although GUAs are typically public addresses, in this configuration they are used privately and function in the same way as Google Cloud-provisioned ULAs.

For more information, see Bring your own IP addresses.