Hi there,
1. GenerateBlocks Pro is a separate plugin, that has to be installed along with the free GB plugin.
2. We have started a YT channel that demonstrates some of its uses:
https://www.youtube.com/channel/UC6qhGBk96asTcTWW42-yT2Q
And theirs some great stuff by Mike Oliver:
https://www.youtube.com/channel/UCI1BPuUnVZqNSLdOxMFY6Kw
3. You can see a demo of the current templates included in the Pro version here:
https://library.generateblocks.com
Asset Library – is for creating your own libraries of SVG Icons and Shape Dividers:
https://docs.generateblocks.com/article/asset-library/
Custom Attributes allow you to add data-attributes to any of the blocks which can be used in your own custom developments:
https://docs.generateblocks.com/article/custom-attributes/
Global Styles – these allow you to save a library of pre-defined global styles eg. A Headline Block with preset sizes colors – which can be one click loaded in the editor:
https://docs.generateblocks.com/article/global-styles/