Currently there is only support for Button text strings, but Gravity Forms and WPGraphQL For Gravity Forms both allow for Button type to be image and have imageUrl for the submitButton for the whole form itself, and both nextButton and previousButton in the Page field type.
There doesn't seem to be support from Gravity Forms for an image alt.
Currently there is only support for Button text strings, but Gravity Forms and
WPGraphQL For Gravity Formsboth allow for Button type to beimageand haveimageUrlfor thesubmitButtonfor the whole form itself, and bothnextButtonandpreviousButtonin the Page field type.There doesn't seem to be support from Gravity Forms for an image alt.