"She believes her wedding chapel has been a gift from God and remains true to her convictions in terms of her Christian faith."
Gore said his mother had reconsidered her position and accepted that their wedding business can not be separated due to her personal beliefs.
Stoneridge Estate has hosted nearly 100 same-sex wedding ceremonies and receptions.
It was only after media contacted the lodge on Friday that they decided to remove the ban, Gore said.
Stoneridge is known to attract high flying guests with former All Black Ali Williams and his partner Casey Green exchanging nuptials there in 2011. Richie and Gemma McCaw's honeymoon was there earlier this year.
Same-sex marriage has been legal in New Zealand since 2013, while civil unions were legalised in 2005.