@kodiakbare
What you've reported in the above post is the best that anyone else has also reported about available search options using an 'unofficial' map. However i think what you've been told as quoted below is unlikely because it seems the POI search problem is based in a firmware/map lock-down. Using a map image in any device does not result in any actual changes being made to the map's data in *.img file itself regardless, POIs included. That said, i for one will be interested in seeing your report after you've tested the map supplied by the zumo user.
Quote Originally Posted by kodiakbare View Post
UPDATE: In regards to the POI searching issues, I was told that if you edit/created a map using Zumo and load that map to Nav system using standard CF card, ALL search function, including POI search by name will remain functional as it was in Zumo
There's an interesting function of some Garmin devices that's not well-known. Loading two map versions covering the same area and selecting only one as active may allow POI's from the inactive map to be utilized by the active map. In the case of GW navis that would mean combining the two img files with GMapTool or using MapInstall to make a composite gmapsupp.img but unfortunately it's not likely that one set of data could be de-selected in the navi's settings i'd think. It's quite a while since i've used a navi on a GW and don't have access to one presently.