% posted by WS in response ISH

\definefontfamily     [palatino_cg] [rm] [TeX Gyre Pagella]
\definefallbackfamily [palatino_cg] [mm] [TeX Gyre Schola Math] [range={lowercasescript,lowercaseboldscript,uppercasescript,uppercaseboldscript},force=yes]
\definefontfamily     [palatino_cg] [mm] [TeX Gyre Pagella Math]

\setupbodyfont[palatino]

\starttext

\m{\cal ABCDEFG \quad \bf ABCDEFG}

\switchtobodyfont[palatino_cg]

\m{\cal ABCDEFG \quad \bf ABCDEFG}

\stoptext
