I am trying to import a Gradle project into IntelliJ, and when I get to the Gradle Home textbox, it is not automatically populated, nor will typing in the path
Gradle Home
In case you are using Mac, most probably your gradle home should be /usr/local/gradle-2.0 for example.
/usr/local/gradle-2.0
In preference of IDEA search for gradle and set gradle home as given above. It should work