The following example shows the number of routes.
vcadmin@vcg1-example:~$ sudo /opt/vc/bin/getcntr -c memb.mod_gw_route_t.obj_cnt -d gwd-mem 
8262
vcadmin@vcg1-example:~$ 

If the number of route entries exceeds the maximum supported value, customers should be moved to alternate Gateways to reduce the route count.