Looks like they have been since 2014, then under the Star FM branding.
Before that, 3GG - then owned by Resonate as a de facto Triple M LocalWorks affiliate - took the Triple M call, judging by some old broadcast guides. 3GG flipped to the Crocmedia call in 2014 according to this from Radioinfo, and the Triple M call moved over to Star.
(As a side note, that piece suggests the “return” of 3GG to the Crocmedia call. Your guess is as good as mine as to what the arrangement was pre-2012)
Of course, 3GG dropped AFL altogether in 2017, as covered on MediaSpy at the time - the Crocmedia call is heard on Gold 1242.