Yes, GMT started to support LaTeX since last version (GMT6.2.0) but one need to have LaTeX installed. I had troubles with it on Windows when I refused to install the gigantic full LaTeX package and so never tried it nor tried to get some more julian syntax in GMT.jl. This is something I want o tackle someday but preferably it should be something similar to what Makie start doing also recently. Meanwhile to use LaTeX equations one must use the pure GMT syntax, i.e. pass text strings to the frame option or in the text module.
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