How to change the default fonts in GT

In a Discord discussion Tudor Girba explains how to change the font.

TBlTextStyleable compile: 'glamorousRegularFont
    self fontName: ''Desyrel'''.
TBlTextStyleable compile: 'glamorousRegularDefaultFont
    self defaultFontName: ''Desyrel'''.

Konrad Hinsen suggests changing the font to JuliaMono to see Math Symbols.

TBlTextStyleable compile: 'glamorousRegularFont
    self fontName: ''JuliaMono'''.
TBlTextStyleable compile: 'glamorousRegularDefaultFont
    self defaultFontName: ''JuliaMono'''.