You can see in the play guide on the Lodestone
- under "Other"
/gearset
ALIASES:
/gearset, /gs
USAGE:
/gearset [subcommand]
→Execute gear set functions.
>>Subcommands:
change [number]
Equip gear in slot [number].
view [number]
List gear in slot [number].
save [number]
Save current gear to slot
[number].
delete [number]
Delete slot [number].
Gear set list will be displayed when no subcommand is specified.
So together with /Shout (... xD) you can make your wanted macro for your transformation (HENSHIN~).
Perhaps also with pose emote and /wait to change gear exactly during the end of /pose?
Nice!