The Grafton resident denied seven charges of intentional damage despite being convicted on three previous occasions of tagging the words "GOSYS", "GOSUS", "YOSYS" or "YOSUS" on property around the city.
His criminal history, which involved tagging the words on a car, shop door and a sign, was used as propensity evidence as the police built a picture of a recidivist offender.
His trial concluded last week after police and council staff gave evidence.
Giving his verdicts yesterday, Judge Grant Fraser said he was left "in no doubt whatsoever" that Goode was responsible for the crimes.
Each tag costs the council $31.46 to remove and a spokesman said they would pursue Goode for the costs of repairing the damage - a bill of $26,174.
Detective Stuart Hunt investigated the offending, which took place between 2010 and 2013, and said Goode was immediately considered a person of interest.
He was home when a search warrant was executed and he showed detectives to his bedroom.
There they found a metal storage locker covered in graffiti with cans of spray paint inside, which Goode said were his.
Ross James Goode, 25, was found responsible for more than 800 tags over a three-year period. Photo / Dean Purcell
Other cans in the room belonged to his girlfriend who was an artist, he said.
Mr Hunt examined the graffiti on the locker closely and found the word "GOSYS" multiple times in different colours and sizes on its exterior.
Goode declined to speak to the police, but did tell Mr Hunt what "GOSYS" meant.
"He said it was derived from Korean and mainly used to describe an expert in a chosen field, in particular computer games," the detective said.
Key evidence during the trial also came from Patricia James, a police documentation expert from Wellington who usually deals with handwriting and signatures.
She "conservatively" narrowed down the 832 tags provided to her to 450, which she said she was confident had been produced by the same person.
"It's very fluent with a moderate level of complexity," Ms James told the court.
Judge Fraser was sceptical of the skill behind the work.
"I don't think I'd be hanging one on my wall like a Banksy," he said.
After delivering guilty verdicts on seven representative charges of intentional damage, Judge Fraser ordered a probation report to canvass the possibility of home detention or community detention, but it came with a warning.
"It doesn't mean that will be the outcome," he said.
"With your record, jail is a clear possibility."
Tagging spree
*Auckland Council found 832 examples of the "GOSYS" tag in the city
*It costs teams an average of $31.46 to remove each tag
*Ross Goode's offending cost the council $26,174
*His offending took place between 2010 and 2013
*The maximum penalty for intentional damage is seven years in prison
