gmt plot adhikari_yamada_2compltge2l3.txt -W.12 -Sc.10c -Gblue -l"M2-2.9"
gmt plot adhikari_yamada_2compltge3l4.txt -W.12 -Sc.12c -Gorange -l"M3-3.9"
gmt plot adhikari_yamada_2compltge4l5.txt -W.12 -Sc.14c -Gbrown -l"M4-4.9"
gmt plot adhikari_yamada_2compltge5l6.txt -W.12 -Sc.16c -Gcyan -l"M5-5.9"
gmt plot adhikari_yamada_2compltge6l7.txt -W.12 -Sc.18c -Gmagenta -l"M6-6.9"
gmt plot adhikari_yamada_2compltge7.txt -W.12 -Sa.8c -Gyellow -l"M ≥ 7"
gmt legend -DjBR+w2.5c/2.5c -F+p1p+ggray95+s
this code does not print greater than equal to symbol in legend box.
some one please suggest what went wrong