"Gab.com is under maintenance. Sorry for the inconvenience but we’re performing some maintenance at the moment. We’ll be back online shortly!
— The Team"
"Safari can't find the server. Safari can't open the page https/parler.com/feed because Safari can't find the server Parler.com."
Gab is simply getting hammered from too much traffic.
Hope that's all it is.
I'm pretty sure that's the case. They're working on getting more servers up to account for the heavy influx of new and returning users.
Read somewhere that there were 600k new users in one day.