Divi does not support all Google fonts. To use another Google font, you can either download it from Google and upload it to your website, or use CSS to add the font.

1. Search the font here: https://fonts.google.com/
2. Add the following CSS to add the font for all headers and body text
3. More detailed instructions http://quiroz.co/adding-new-google-fonts-to-your-website/

/* -- START Import Google Font --*/
@import url(https://fonts.googleapis.com/css?family=Gabriela);
h1, h2, h3, h4, h5, h6 {
	font-family: 'Gabriela', serif;
}

@import url(https://fonts.googleapis.com/css?family=Libre+Franklin:300,400); 
body, p {
	font-family: 'Libre Franklin', sans-serif  !important;
	font-weight: 400;
}
/* -- END Import Google Font -- */

Code language: CSS (css)