The home side won two of the three ODIs and secured a clean sweep in the three-match T20 series.
McGrath opened the series with a thrilling 97 from 90 deliveries, plus 3/48 with the ball, in what was unfortunately Australia A’s only loss in the six-match series.
The 24-year-old allrounder took seven wickets across the five matches she bowled in, while also averaging 25.16 with the bat.
Fellow Statewide Super SA Scorpions Bridget Patterson and Amanda-Jade Wellington also featured in the side, with Patterson compiling a high-score of 47 in the 50-over format.
The 25-year-old, who was last in the Australia A side back in 2016, made 111 runs at an average of 27.75 across both formats.
Wellington, 22, had a quieter series but was particularly economical in the second and third matches of the ODIs, collecting figures of 0/22 and 0/15 from five overs.