Depends on what you want to do.
If you're looking for past content, The
Wayback Machine is your best shot for the defunct GuildPortal. (There's a beta Site Search, but for the most part,
you have to know the URL or address of the page you are looking for. If your group used a purchased domain to redirect to the GuildPortal link, that part is easy. If not, well...) It also works for SGs that didn't use GuildPortal. (One example: Triumph's
Fusion Force.) As long as the website allowed spiders (Search Indexing), it will appear in the Wayback Machine.
If you want to make a place for your current or past group, you still have options.
Enjin.com isn't bad, that is, if you're looking for a new home for your Super Group or a MMO Guild in another game that behaves very similarly to GuildPortal. Other non-Gaming hosts include
Weebly,
Wix, or
Google Sites which will get
a revamp that G Suite users have access to
that I imagine will land on the public side soon. (Nevermind,
the new Google Sites has soft-launched.)
There's also
Discord, which is like Slack for gamers (with Multi-User voice chat baked instead of Slack's Calling feature). Discord may be more player-friendly if you don't want to go through "putting a site together" and like social media discussions more than Web 2.0 stuff.