I've just successfully installed www-apps/gallery-2.3.1 on my Sun Fire T2000 server with lighttpd-1.4.32, mysql-5.1.66 and php-5.3.15. Installation went flawless and everything seems to work normally. Since gallery is written in php, it should not really matter that much what hardware it runs on anyway. Reproducible: Always
The sparc team doesn't want to add new keywords unless necessary, sorry.