Fonts Plugin has native support the new editor (Gutenberg).
Simply add a new block and search for
The Google Fonts block has the following attributes:
Block Type (Paragraph, H1, H2, H3, H4, H5, H6)
Font (900+ Google Fonts)
Font Size (px)
Alignment (Left, Right, Center)
Regular paragraphs and heading blocks can also be transformed into Google Font blocks.