Excellent question. I am glad that you already know about the unit gigapascal (GPa). I only went upto 30 GPa with inorganic carbides (Li2C2 and CaC2).
We made one new compound LiBSi2 at 10 GPa.
Currently I am using DAC for large organic molecules; and I do not need much high pressure. I made a new form of one anticancer drug at 0.3 GPa.
There is other apparatus for generating pressures (other than DAC). Please search and let me know what are those? If you cannot find, let me know.