WHOIS Details:

WhoisDog failed to connect to WHOIS server: whois.nic.gs

Root Zone Database:
https://www.iana.org/domains/root/db/gs.html

Try these WHOIS services:
http://whois.nic.gs
http://tian.hu/zig.gs
http://whois.gd/zig.gs
http://who.cx/zig.gs
http://whois.domaintools.com/zig.gs
https://whois.gandi.net/en/results?search=zig.gs
https://www.godaddy.com/whois/results.aspx?checkAvail=1&domain=zig.gs&prog_id=GoDaddy
https://www.namecheap.com/domains/whois/results.aspx?domain=zig.gs
https://who.is/whois/zig.gs/