The 27-year-old met with the Crows on Monday and told them he had been offered a contract from the new franchise that was hard to refuse.
While the deal is not yet finalised, Bock’s manager Ricky Olarenshaw said on Tuesday that club and player had agreed to part ways with two games remaining.
“It’s been a little bit fast-tracked in what we initially thought, but he’s had an offer on the table for a couple of months now and he’d been pondering his future throughout that time,” Olarenshaw told SEN on Tuesday.
“We weren’t going to make a decision until after the season, but once the Crows were out of the finals race there had been speculation he was going to the Gold Coast so he had a deep and meaningful with the club yesterday.
“He said he was most likely to take the offer and they were happy he was honest and said, ‘If you’re going to take up the offer, there’s probably no point in playing the last two games, give them to a young player’.
“He agreed to that and he’ll stand down today.”
Olarenshaw said Bock’s Gold Coast terms were not “official” yet but his client was looking forward to heading to the new club.
Bock will become the Suns' first high-profile signing.
“I still haven’t agreed on a contract as yet. That’s still in negotiations,” he said.
“Until that point, until we agree on terms, he’ll officially become a Gold Coast player then.
“At the moment, we have an offer from the Gold Coast which is enticing but it’s still not finalised.”
He said the Suns’ interest in Bock escalated when Adelaide’s Queensland-born forward Kurt Tippett rejected their advances.
He also said he was unsure of how or if the Crows would be compensated for the loss of their 113-game key position player but said Bock was prepared to lose any remaining salary owed by the club to leave early.
“For Nathan to stand down, he may miss out on bonuses and incentive payments, particularly [from] the best and fairest,” he said.
“That’s something other players would have to consider.
“If another player out in the AFL wants to stand down this week as well, he is giving up income he could possibly earn.
“Nathan was willing to give that up as well. He hasn’t asked the club for more match payments or considered best and fairest incentives.”
Bock had previously admitted he was mulling over a lucrative three-year-deal to join Gold Coast, but denied that his bags were packed.
Bock, a former pro-junior surfer, developed into an elite player after being promoted from the Crows’ rookie list in 2004.
He played 113 games and earned All-Australian selection at centre half-back in 2008.
The former Woodville-West Torrens junior had a year to forget in 2009 after being suspended for a week and fined for assaulting his girlfriend in an alcohol-fuelled incident at an Adelaide hotel.
Injury derailed his finals campaign last season and has also restricted him to just 13 games in 2010.