As per the AGM presentation they are conducting more drill testing at Mt Gunson, scoping study due for completion 1st half 2018. Thouhg a lot of work and drill testing including JORC reports have already been done on site by Torrens mining, from which GBG has farm in agreement yo earn up to 75% interest in specific tenements. Mt Gunson is a few hours down the road from Olympic Dam.
If you want to do some reading check out Torrens mining,