Swipe Gestures are available for most Page Format (excluding the Continuous Scroll formats).

The option to enable swipe gestures can be found in the Basic section of the in5 export dialog (File > Export HTML5 with in5...).
Page format and Navigation area with the Basic section of the in5 export dialog

Once selected, tapping (or clicking) and swiping to the left or right will trigger back and next page actions.