[AstralStorm]

GPL does not force you to publish anything. But if you do publish a derivative work (including a binary) you must make sources available on request.

A WordPress-generated website is likely not a derivative work of WordPress source code. (Which is why Affero GPL exists.)

The further specifics depend on GPL version employed.

[whatyoucantsay]

Ah, I'd been thinking this was a theme. If it's a site generated with WP, that's completely different.

My reaction was largely to the poster's self-righteous attitude about "theft", which has mapped to many GPL violators I've encountered.