I'm in the Turnagain area just north from Lake Hood/ANC Airport. And unfortunately no mention of any other repeaters in the Anchorage area that I could find besides the outdated one. I've been occasionally getting weak transmissions from my area where I am but it's hit or miss on signal strength (running a UV-9G handheld at the moment until I put in a mobile in my vehicle).
I think the main problem with Anchorage is that coverage is very difficult even with one repeater unless in a high enough location by Rabbit Creek, Flat Top, JBER which HAM operators have done already but nothing with GMRS from what is publically listed.
I'll keep an eye out if something pops up but having a repeater service Anchorage would help bridge the gap between here and Eagle River and out to the Valley.