\definetypeface [gyre-book] [tt] [mono] [courier]
\definetypeface [gyre-book] [mm] [math] [palatino]
\stoptypescript
\definetypeface [gyre-schol] [rm] [serif] [schola]
\definetypeface [gyre-schol] [tt] [mono] [courier]
\definetypeface [gyre-schol] [mm] [math] [palatino]
\stoptypescript
\definetypeface [gyre-termes] [rm] [serif] [termes]