lets define a GARP packet for IPv6

For IPv4 it is like : packet format is [eth:ARP] It means it works in Later 2 and can be used in any media.
Ethernet Source interface MAC address 00-16-EC-D4-AA-F5
Destination ff-ff-ff-ff-ff-ff

ARP Source IP Address 10.1.1.1
Target IP address 10.1.1.1

For IPv6 : Packet Format is [eth:IPv6:icmpv6] it means it works in layer 3
Ethernet Source 00-16-EC-D4-AA-F5
Destination 33-33-ff-D4-AA-F5

ICMPv6 Source Address ::
Destination IPv6 Address FF02::1:FFD4:AAF5

Target Address fe80::216:ECFF:FED4:AAF5


Normal ARP Packet in IPv6 called NS neighbor solicitation
Ethernet Source 00-16-EC-D4-AA-F5
Destination 1 - 33-33-ff-D4-AA-F5 multicast or
2 - unicast address of other host
ICMPv6 Source Address 1 - :: for GARP
2 - Unicast source address
Destination IPv6 Address FF02::1:FFD4:AAF5

Target Address fe80::216:ECFF:FED4:AAF5

Note Target Address must not be multicast address.

Thanks
CCIEnotes