Since it's been a day since I've gotten any response from this, I guess I'll try and dig up what Gentoo says about wireless, and which programs are responsible for making wireless work. I have checked the "Users/Permissions" form the drop-down menu in Mate, and I am showing a check beside "Connect to wireless and internet networks."
This is an older Presario laptop, with a Broadcom b43 wireless chip that wasn't configured until I did a few updates. I was trying to figure out how to get the Broadcom working, when I noticed that Broadcom was one of the dependencies that showed when I updated the kernel. Now I show my home network, but somehow I haven't got permission to connect, even after running the script that sabayonino gave. I've tried it twice now, in case I miss-typed before, still no wireless, even though my network(s) both show, as well as several others.
Before getting the Broadcom to work, I used a Belkin usb plug-in wireless, and that worked without a problem. I'll try that again and see what happens.