"They want him never to have the opportunity to abuse children again," she said.
Gibbons plead guilty to the charges after a sentence indication hearing before Judge John McDonald last month.
He admitted two charges of rape, 12 charges of unlawful sexual connection, a representative charge of attempted sexual violation by unlawful sexual connection and one charge of sexual conduct with a girl under 12.
The offending against the older girl happened in 1999 when Gibbons took her for a ride in his car at night. He bought a bottle of alcohol and both drank it before he stopped in a park where he raped her.
The girl wrote an account in her diary, which was later discovered by an adult.
The second victim was aged 7 when she was sexually abused over a 12-month period from 2006.
That included making her perform sexual acts on him while he watched pornography on television.
In 2014 she told her father what had been happening and Gibbons was interviewed by police about both girls and denied anything had occurred.
During sentencing Judge McDonald said the families had been deeply traumatised by the offending.
He was concerned about a pre-sentence report which showed on one hand Gibbons was remorseful, but on the other was trying to minimise his offending.
"Unless you do a sexual offender's course while in jail, you will remain a very serious risk to young girls. The parole board should think long and hard before releasing you if you have not done such a programme," Judge McDonald said.