Add it in the Intellij's libraries? I can see Gemfire has found the GEODE_HOME path but can't find the war files from there.
[info 2020/02/11 17:35:25.375 GMT <main> tid=0x1] GEODE_HOME:C:\FAST\pivotal-gemfire-9.9.0
[warn 2020/02/11 17:35:25.376 GMT <main> tid=0x1] geode-web-api war file was not found
[info 2020/02/11 17:35:25.376 GMT <main> tid=0x1] Unable to find GemFire Developer REST API WAR file; the Developer REST Interface for GemFire will not be accessible.