They are located in your xml config as far as I’ve discovered:
C:\Users\USERNAME\AppData\Roaming\Guild Wars 2\GFXSettings.Gw2.exe.xml
Find the line: <OPTION Name=“antiAliasing” Registered=“True” Type=“Enum” Value=“fxaa”>
And change fxaa to either smaa_low or smaa_high
Yes, the ingame AA menu will then be blank. (Do this outside of game after taking a backup, it writes the xml on exit overwriting changes)