To start the Selenium Server you don't need to pass GeckoDriver as a parameter and to start the Selenium Server in default configuration you can use the following line of command on Windows OS :
>java -jar selenium-server-standalone-3.11.0.jar
Console Output :
C:\path\to>java -jar selenium-server-standalone-3.11.0.jar
16:05:41.383 INFO [GridLauncherV3.launch] - Selenium build info: version: '3.11.0', revision: 'e59cfb3'
16:05:41.384 INFO [GridLauncherV3$1.launch] - Launching a standalone Selenium Server on port 4444
2018-04-24 16:05:41.539:INFO::main: Logging initialized @523ms to org.seleniumhq.jetty9.util.log.StdErrLog
16:05:42.071 INFO [SeleniumServer.boot] - Welcome to Selenium for Workgroups....
16:05:42.071 INFO [SeleniumServer.boot] - Selenium Server is up and running on port 4444