McGillvary turned in barnstorming display against Cas, scoring two tries and looking like an international winger.
“He’s a world class player isn’t he?” Anderson told his club’s official website.
“He’s a great player and I’d sooner be playing with him than against him.
“The form he’s in at the minute and the way he’s finishing things, he’s not just a try scorer he’s more of a yardage player, he causes teams a lot of problems when he’s bringing the ball back.
“I have joke with him that he’s going to be a front rower when he’s older because he carries the ball like a front rower but at a million miles an hour.”
Anderson also praised Giants centre Leroy Cudjoe, whose partnership with McGillvary on Huddersfield’s left flank looked really dangerous against the Tigers.
“I think Leroy’s had a very good last month,” he added.
“He’s getting the ball in a little more space. You’ve seen our right edge getting together a little bit more with their combinations and we’re getting the ball in hands a little bit earlier which is making them run a bit more.”