I just tried this, by using:
ln -s GRID\ Autosport/ GRIDAutosport
env
LD_PRELOAD='/usr/$LIB/libstdc++.so.6:/home/juergen/.steam/SteamApps/common/GRIDAutosport/lib/x86_64/libtcmalloc_minimal.so'
{rest of the usual command line here}

I still get an error related to GLSL:
GridAutosport: ../../../../src/mesa/state_tracker/st_glsl_to_tgsi.cpp:2342:
virtual void glsl_to_tgsi_visitor::visit(ir_dereference_variable*): Assertion
`var->data.location != -1' failed.