If you instal MCR (MATLAB Compiler Runtime) provided by GISTIC package, may have the following error. This error could disrupt GISTIC.
libGL error: failed to load driver: swrast

If this situation occurs, rename the file found at ” $MATLAB_ROOT/sys/os/glnxa64/libstdc++.so.6″ to “libstdc++.so.6.old”, This forces MATLAB to use the OS library.

Works for me.

Ref:
https://ww2.mathworks.cn/matlabcentral/answers/296999-libgl-error-unable-to-load-driver-in-ubuntu-16-04-while-running-matlab-r2013b

GISTIC2.0 facilitates sensitive and confident localization of the targets of focal somatic copy-number alteration in human cancers