I was living in Switzerland last year so got the guide that seemed most extensive, called Alpen en bloc. Comes in parts, but part one has magic wood. Seems pretty good with photo guide. However, it was totally crap for when i visited Gotthards pass. The main problem is that within the mini maps for individual areas, they flipped the maps so north was in a different direction for each map. I can't explain how complicated this was. In fact, i ended up printing a google map and drawing the maps on myself. So, follow the above advice and use the free topo for Magic wood and get the ones for Ticino when ur there. That being said, Gotthard was amazing and very beautiful. If you end up driving to Ticino (cresciono etc) from the north, then you just need to come off the motorway on the way and go up the old mountain pass road instead of taking the tunnel. Naturally this all depends on when you go, because at the moment it will be under 3 feet of snow.
Rob