If you have your own website, but want to use RxGym for 'member only' functionality, not a problem. You can use the iframe html tag to embed any RxGym page into your own website. For the 'src' value of iframe simply use any page of RxGym and include 'portal=true' as an input parameter of the url address.
Here is an example for the RxGym Class Schedule:
If you have any links for members to gain full access to your RxGym website, you will need to add the 'portal=false' parameter to those links so they see the full header and footer.