I am still checking about costs etc for your grandfathers records will get back to you.
However I did find Joseph Gault & his wife Jessie Elizabeth buried at Toowong Cemetery.
Gault Joseph died: 19 / 10 / 1956 age: 59 years
Gault Jessie Elizabeth died: 07 / 12 / 1946 age:46 years
Courier Mail 1946
GAULT, Mrs. Jessie E. The Relatives & Friends of Mrs. Jessie Elizabeth Gault. of 'Doon Doon.' Nanango, are Invited to attend her Funeral, to leave the Funeral Chapel. Wickham St., Valley. This (Saturday Forenoon, at 11.15 o'clock, for Toowong cemetery. K. M.SMITH, B2695.