Ghost Port Scan is an advanced port scanner and a firewall rule disclosure tool. Uses IP & ARP spoofing, sniffing, stealth scanning, arp poisoning, IP fragmentation, and other techniques to perform stealth and untrackable information collection. GPS is especially efficient in LAN pen-testing, due to its ability to disclose the firewall settings of a host.
You can download it from the following link: https://packetstormsecurity.com/files/download/25722/gps-0.9.0.tar.gz
Source: https://packetstormsecurity.com/files/25722/gps-0.9.0.tar.gz.html