He is Winston's enforcer. Tim Donoghue has a little gem of an article on page 2 of the Dominion Post today.
Donoghue reports that "NZ First's mysterious Tauranga staff member [paid for by Parliamentary Services] Tommy Gear was used to lean on the Maori Party to get it to change its parliamentary voting stance against Winston Peters.
The DomPost also reports that "Mr Peters said yesterday he was not going to waste his time commenting on "mindless speculation" about a possible meeting. He denied any knowledge of this meeting [a bit like donations we guess] and said that he had no intention of talking to Mr Gear about it.