Gideon's Triumph still in effect same round it is destroyed.

In the Standard Training grounds, destroying Gideon's Triumph by matching (it had 1 shield and was matched out of the board)  still had the effect of destroying the first attacking creature on that round.

Following rounds, no effect, so apparently as opposed to Exiling it - which was already reported -  the support is only still in effect the round it is destroyed by matching or destroying.