The 23 year-old made his debut for the province against Cardiff in November 2010. He has scored 25 tries in 99 appearances so far.
Nick Williams, Louis Ludik and Stuart McCloskey are also included in the match-day squad having recovered from injury, with Williams selected at Number 8, Ludik at fullback and McCloskey named among the replacements.
With the returning players and international commitments, there are five changes and two positional switches to the side that defeated Leicester Tigers at Kingspan Stadium three weeks ago.
Props Callum Black and Wiehahn Herbst maintain their places in the front row, with Rob Herring, who represented Ireland Wolfhounds last week, selected at hooker.
Lewis Stevenson is picked in the second row where he is partnered by Franco van der Merwe.
Williams is joined in the backrow by captain Roger Wilson who moves from Number 8 to blindside and Mike McComish, who starts again at openside.
Gilroy and Ludik are joined in the back three by Michael Allen with Darren Cave, who scored a hat trick of tries against the Tigers, lining-up in midfield alongside Luke Marshall.
Ruan Pienaar starts at scumhalf with Ian Humphreys, who needs just nine points to break the 500 mark in PRO12 rugby, selected at outhalf.
Robbie Diack has been released from the Ireland international squad and is named on the replacements' bench. He is joined by fellow forwards, John Andrew, Andrew Warwick, Bronson Ross and Clive Ross.
Backs, Paul Marshall, Stuart McCloskey and Peter Nelson complete the match-day squad.
More than 15,000 tickets have been sold for the match. Tickets for the game are still available and can be purchased via Ticketmaster.
Fans will also be able to buy on the gate tomorrow evening, although for the best available tickets, supporters are encouraged to purchase in advance.
The match will be live on BBC 2 Northern Ireland.
Ulster team & replacements to play Benetton Treviso, Guinness PRO12, Kingspan Stadium, Friday 13th February (19:35 kick off): (15-9): L Ludik; C Gilroy, D Cave, L Marshall, M Allen, I Humphreys, R Pienaar; (1-8): C Black, R Herring, W Herbst, L Stevenson, F Van der Merwe, R Wilson (Captain), M McComish, N Williams; Replacements (16-23): J Andrew, A Warwick, B Ross, R Diack, C Ross, P Marshall, S McCloskey, P Nelson.
Guinness PRO12
Suite 208, Alexandra House,
The Sweepstakes
Ballsbridge, Dublin 4, Ireland