This Gmod list has a pretty decent chunk of the most popular role-play content used in gmod servers. List is subject to change.
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=612036518

this is the custom map cycle used in the KF2 server. This should prevent the "Re-Direct" and "Map Mismatch" errors. Please check the list every so often as maps in the list may change.
http://gtm.steamproxy.vip/sharedfiles/filedetails/?id=842631050