Name your image by the TITLE only.
It will look like this: TITLE.jpeg or TITLE.jpg
example: UPHILL CLIMB.jpg
Add your caption like this:
TITLE,
[et_pb_wpt_gravityform gravityform_id=”gf-5″ description=”off” ajax=”on” input_container_custom_padding=”0|8px|0|10px|false|false” label_custom_padding=”0|0|0|10px|false|false” sub_label_custom_padding=”0|0|0|10px|false|false” field_description_custom_padding=”16px|0|0|10px|false|false” section_field_title_custom_padding=”0|0|0|8px|false|false” title_custom_padding=”10px|0|0|0|false|false” _builder_version=”4.9.4″ _module_preset=”default” input_font_text_color=”#000000″ section_field_title_font=”|800|||||||” section_field_title_text_color=”#000000″ background_color=”rgba(224,153,0,0.38)” border_width_all_input_general=”2px” border_color_all_input_general=”#E09900″][/et_pb_wpt_gravityform]