Details of Gaynor's birth are not known.

Gaynor married Desmond Greenhough in 1965 in Pontypridd, Wales.

She had the following children from her marriage to Desmond Greenhough:

- Marc Desmond Greenhough	born in 1966 in Pontypridd, Wales.
- Karen Collette Greenhough	born in 1970 in Pontypridd, Wales.