A post on the club's website says Gavet's replacement is still to be confirmed while bench forward Bunty Afoa is listed in his place among the the starting side in the NRL's updated team lists.
Along with Gavet, wing Charnze Nicoll-Klokstad was the other player cut from the extended 21-man squad last night, with coach Stephen Kearney due to confirm his final 17 an hour before kick-off.
The onus will be on new recruits Adam Blair and Tohu Harris to lead the way for the visitor's forwards, along with hooker Issac Luke, while new five-eighth Blake Green's experience will be vital in steering the side around the park.
The understrength Warriors go into tonight's match looking to continue their unbeaten start to the season following wins over the Rabbitohs, Titans, and Raiders.
Last week's dramatic 20-19 last-minute win over Canberra was the first time in the club's 24-year history that they have won their opening three matches, and they will hope to continue to break new ground with a fourth-straight victory over one of the premiership favourites.
In 38 encounters with the Roosters since 1995, the Warriors have a 21-16 winning advantage with one draw.
Captain Roger Tuivasa-Sheck is also looking to maintain his unbeaten run against his former club, with the Warriors having won their past three games against the Tri Colours, following a 14-13 victory at Mount Smart Stadium last year, and a tense 12-10 win at home and 32-28 golden point win in Gosford in 2016.
After being stunned 10-8 by Wests Tigers in the opening round, the Roosters rebounded with convincing wins over the Bulldogs (30-12) and Newcastle (38-8) to sit in fourth spot on the NRL ladder just behind the Warriors.
Sydney Roosters v Warriors at Allianz Stadium, 7.30pm
Roosters: 1. James Tedesco 5. Blake Ferguson 4. Joseph Manu 3. Latrell Mitchell 2. Reece Robinson 6. Luke Keary 7. Cooper Cronk 8. Sio Siua Taukeiaho 9. Jake Friend 10. Dylan Napa 11. Boyd Cordner (c)12. Ryan Matterson 13. Isaac Liu
Interchange: 14. Jared Waerea-Hargreaves 15. Zane Tetevano 16. Mitchell Aubusson 18. Nat Butcher 21. Lindsay Collins
Warriors: 1. Roger Tuivasa-sheck 2. David Fusitua 3. Peta Hiku 4. Solomone Kata 5. Ken Maumalo 6. Blake Green 7. Shaun Johnson 17. Bunty Afoa 9. Issac Luke 10. Agnatius Paasi 11. Leivaha Pulu 12. Tohu Harris 13. Adam Blair
Interchange: 14. Jazz Tevaga 15. Ligi Sao 16. Chris Satae 18. Mason Lino 20. Anthony Gelling 21. Albert Vete
Referees: Henry Perenara, Ashley Klein.