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This collection of caches has nothing to do with the Church Micro series in the UK. Given that the Australian 2016 census indicates that No Religion and Jedi Knight are the fastest increasing classifications of the optional religion question "What is the person's religion?" it is not surprising that there is surfeit of empty churches that have been repurposed.
Some history
The former St Leonard's Church of England, Yongala property is now privately owned. The building was erected in 1905 and dedicated on 25/9/1905. The porch was added in 1919. The final service was held on 10/10/1971, conducted by the Right Rev Bruce Rosier, Bishop of Willochia.
Now to find final GZ
On the street information sign of the church
Cost £ABC
Third photo taken date DEFG
Now for the substitution
S33 01.E(B-A-D)F
E138 44.E(B+A)(D+F)
CHECKSUM = 32
Happy hunting!