Thank you for contacting me.
Yes, you can publish a genuine guest post, gambling-related, on any of my sites. Your guest post will stay there forever.
You can add 2-3 Do-Follow links to your sites (I don’t believe in no-follow links), but not affiliate links.
This is a list of my gambling sites:
You have 3 alternatives:
If you need guidelines for your article, you can find them here: https://johnniepoker.com/guest-post/
Now, send your article to progame.inc [at] gmail.com and let me know which alternative you choose.