I downloaded Gradle 3.0 version and set path in environment variable.
" path= %GRADLE_HOME%\bin"
" gradle -v"
set GRADLE_HOME=C:\New_Project_Softwares\gradle3.0 set path= %GRADLE_HOME%\bin;%path% gradle -v
To make sure the path is set, in command prompt type set and see in the path variable the gradle path is set.