According to the Kansas Board of Reagents, the official GED administrators for the state of Kansas, your application for a copy of your GED must be sent via diplomasender.com.
You can process the application online, or by telephone on (855) 313-5799. There is an extra charge of $6.00 for GED orders made by telephone.
Unless you took the test recently, it is very unlikely you will be able obtain a copy for free, but you could try asking at whichever institution you took your GED test to see if they can help.
If you need to contact the Kansas Board of Reagents, you can phone them on 785-368-8333 or write to them at 1000 SW Jackson Street, Suite 520, Topeka, Kansas, 66612. GED themselves can be contact via a live chat stream open during regular office hours via their website.