From Guild Wars Wiki

Warning: Running Guild Wars on a non-Windows operating system, or with any other computer which does not meet the system requirements, is completely unsupported by ArenaNet and NCSoft.

Installing Wine on SourceMage system

Use the following command to install pre-compiled Wine SourceMage system:

cast wine

Continue on Guild Wars on Wine to complet the GuildWars client installation.

SourceMage notes

Noting right now.