The cheapest graphics card you can play it on is an NVIDIA GeForce 6100. An Intel Pentium 4 2.00GHz CPU is required at a minimum to run Galimulator. Galimulator system requirements state that you will need at least 1 GB of RAM.
Galimulator will run on PC system with Windows 7 and upwards. Additionally it has a Linux version.
Minimum System Requirements
CPU
1.0 GHz
OS
Ubuntu 16.04 (probably works on other distros too)