Ann: Launch Update - 3 Diamonds launch confirmed for June 2017, page-66

The translation is pretty rough, but from what I can gather;

The GSLV Mk III has had all 3 stages assembled as of the 24^th May (Wednesday just gone).

The GSLV Mk III is to be transferred to the launch pad on the 27^th of May ahead of the June 5^th Launch.

Following the launch, The SSAB (Solid Stage Assembly Building) will inaugurate the PSLV-C39 assembly operations.

The second stage of the PSLV C38 was integrated as of yesterday, the 25^th of May.

The PSLV-C38 launch is scheduled for June 23^rd.