It is worth mentioning that, although no significant correlation between GPR55 and GBM was found in the databases consulted for this study, when comparing the expression data and Kaplan–Meier survival curves between LGG and GBM, significant differences in both GPR55 and PINK1 expression were observed, as shown in the Supplementary Materials (Figure S7). Here, GPR55 is linked to glioblastoma.