JSFiddle - React, Tailwind, and code Playground
HTML
<li id='field_1_20' class='gfield squaredTwo field_sublabel_below field_description_below' ><label class='gfield_label' >Is it free</label><div class='ginput_container ginput_container_checkbox'><ul class='gfield_checkbox' id='input_1_20'><li class='gchoice_1_20_1'>
<input name='input_20.1' type='checkbox' value='Yes' id='choice_1_20_1' tabindex='35' />
<label for='choice_1_20_1' id='label_1_20_1'>Yes</label>
</li>
CSS
li.squaredTwo li label {
display:none
}
input[type=checkbox]:checked {
background:red
}