Soldier's Home Multi-Cache

We drive past here quite often but never stop. So when planning my very first cache I thought this would be the perfect place to bring more people.  You can easily park nearby.  Beware of worker muggles. The cache is not at the listed co-ordinates.

As quoted on the plaque:

‘This site was formerly occupied by a brick house constructed in 1918 by the Goulburn and District Racing Club for Goulburn Returned Servicemen from the First World War.  The marble plaque was set on the front wall of that house.’

Use information from all of the plaques to solve to find the following:

A – Number of letters in 5th word of marble tablet

B – Number value of the first letter of Edgar Gray’s nickname +5 (ie A=1, B=2, C=3)

C – Joan Knight was Secretary from 1962 to 19x2 

D – Park was constructed in 198x 

E – Number of letters in the city that Andrew Charlton broke World Record +1

F – The last number of the year the Soldier’s Home tablet was unveiled minus the letter value of the 3rd initial of Mr James

To Find GZ

GZ can be calculated using the below: 

S   34 45.ABC

E 149 42.DEF