http://gatling.io/docs/2.2.0/quickstart.html
Best approach? Install the Scala Build Tool (http://www.scala-sbt.org/), then add the following files to create a project that you can import into IntelliJ.
Run sbt to get the build prompt then:
build.sbt
scalaVersion := "2.11.8"enablePlugins(GatlingPlugin)libraryDependencies ++= Seq( "io.gatling.highcharts" % "gatling-charts-highcharts" % "2.2.0" % "test", "io.gatling" % "gatling-test-framework" % "2.2.0" % "test")build/plugins.sbt
addSbtPlugin("io.gatling" % "gatling-sbt" % "2.2.0")