I'm a big fan of Squarespace and the new platform is very well done. There are however a few things now and then that confuse me and one of these is embedding gists from Github.
I thought you'd use an Embed block for this, but for some reason this doesn't work.
Instead you have to scroll down (or search for) the Code block and paste the embed script in there.
Not quite as obvious as I thought, but at least it works.
Below is a random gist I use for converting
WAV files to
CAF for embedding in iOS apps:
The screenshots were edited in Napkin. Its great, you should try it.