Software for modeling circuit theory-based connectivity at any scale. We developed GFlow to solve large ecological problems in a High Performance Computing environment. If solving a small problem or if you are willing to sacrifice some performance, it can be deployed on a desktop computer. v. 0.1.4 Updates GFlow will automatically ignore node pairs with that create short circuits (islands). Updated instructions for installation and execution. Bug fixes. Note: If having difficulty assigning arguments to flags, please check for the most recent description in execute_example.sh on the main repo as this is actively being edited for clarity. v. 0.1.3 Updates Added options for printing progress of simulation and for cleanly exiting simulation. Documented optional execution flags. Updated input files. v. 0.1.2 Updates Updated new flags for effective resistance (effective_resistance), convergence factor (converge_at), and shuffle node pairs (shuffle_node_pairs)