Add Font Awesome to Gravity Forms Submit Button

<?php
// filter the Gravity Forms button type
add_filter("gform_submit_button_1", "form_submit_button", 10, 2);
function form_submit_button($button, $form){
return "<button class='button' id='gform_submit_button_{$form["id"]}'><span><i class='fa fa-share fa-2x'></i> Send </span></button>";
}
//Change hook of gform_submit_button_X to the form that you are using 
//Change <span><i class='fa fa-share fa-2x'></i> Send </span> to Font awesome and text of your choice

This is an awesome, straightforward example and worked perfectly! Thanks for sharing!!

To use the button backend text, you should do something like that :

add_filter( 'gform_submit_button', 'form_submit_button', 10, 2 ); function form_submit_button( $button, $form ) { return "<button class='button gform_button' id='gform_submit_button_{$form['id']}'><span class="icon icon-arrow" aria-hidden="true"></span>{$form['button']['text']}</button>"; }
And of course aria-hidden="true" for a right accessibility as you put an icon in your button.

The important for the text is {$form['button']['text']}

{$form['button']['text']} not works for me, I have to use {$form['buttonText']} instead. (GF v2.6.3)