Gilroy has managed to recover from the concussion he suffered playing for Ulster against Montpellier back on January 10 in the Heineken Cup and will turn out for the Irish Wolfhounds against the England Saxons.
And with a strong showing this weekend at Kingsholm, he believesit will strengthen his case for a senior spot.
"Last year when I was playing Tommy Bowe was fit," Gilroy told the Irish Times. "It was Simon Zebo at 15, and Andrew Trimble, Luke Fitzgerald and Fergus (McFadden) were all there too. Everyone's here now except Tommy.
"Everyone's been playing well for their club, so no one really knows who Joe's going to go for.
"So that's another reason why it's really important to have a good game this weekend, because who knows where you could be in two weeks' time?
"Definitely you want to produce something strong. You want to get out and play some good rugby, and give Joe a bit of a headache when selection time comes around again.
"I wouldn't say I'm quite at full sharpness yet but I'm definitely back to full fitness, which is good, so just coming off the back of two Heineken Cup games where we did well.
"So I'm back to full fitness now and just hoping to make an impact.
"Hopefully this weekend again is an opportunity for me to put my hand up, to be used throughout the course of the competition."
Follow us on Facebook, join the conversation on Twitter, sign up to our YouTube channel for extensive match highlights and sign up to our newsletter for regular updates on the RaboDirect PRO12
63x46.png){kind=logo}