It isn't useful as you get so many "rolls" on the Gossip chance, you don't need each roll to be 100% to have an effective 100% chance of locating Townhall Quests and Rumour Bosses.
For fun, assuming 6 each in Personality (30) and Awareness (15) is 45 Plus Gossip 3 (15) = 60
Rogue (+10 class...