The Lelos, ranked 11th in the world, have faced Romania, the USA and Scotland over the past month in preparation for the tournament.
They start their campaign against two-time winners Australia on September 9th before also playing Portugal, Fiji and Wales in Pool C.
"I wish we had four warm-up games, or two meetings with Tier 1 teams, but it's not up to us," Maisashvili said in a Georgian Rugby Union statement.
Of his squad, he said: "We have been observing these rugby players for a long time, we know their abilities well, and I believe that the best 33 have been selected at this stage."
Centre Merab Sharikadze leads Maisashvili's side, the winners of the past five second-tier Rugby Europe Championships.
Winger Alexander Todua as well as full-back Lasha Khmaladze, both 35, will feature in their fourth World Cups, with Khmaladze also being able to feature at fly-half.
There is also a place for exciting full-back Davit Niniashvili, who scored nine tries for French club Lyon last season as well as his domestic team-mate, the abrasive flanker Beka Saghinadze.
Georgia squad for the Rugby World Cup (September 8th-October 28th):
Forwards
Props: Mikheil Nariashvili (Montpellier/FRA), Guram Gogichashvili (Racing 92), Nika Abuladze (Exeter Chiefs/ENG), Beka Gigashvili (Toulon/FRA), Guram Papidze (Pau/FRA), Luka Japaridze (Montpellier/FRA)
Hookers: Shalva Mamukashvili (Black Lion), Luka Nioradze (Aurillac/FRA), Tengiz Zamtaradze (Black Lion)
Locks: Kote Mikautadze (Bayonne/FRA), Nodar Cheishvili (Black Lion), Lasha Jaiana, Lado Chachanidze (both Nevers/FRA)
Back row: Beka Gorgadze (Pau/FRA), Beka Saghinadze (Lyon/FRA), Giorgi Tsutskiridze (Stade Francais/FRA), Tornike Jalagonia (Biarritz/FRA), Mikheil Gachechiladze, Luka Ivanishvili (both Black Lion)
Backs
Scrum-halves: Vasil Lobzhanidze (Brive/FRA), Gela Aprasidze (Bayonne/FRA), Tengiz Peranidze (Black Lion)
Fly-halves: Luka Matkava (Black Lion), Tedo Abzhandadze (Montauban/FRA)
Centres: Merab Sharikadze (capt), Tornike Kakhoidze, Demur Tafladze (all Black Lion), Giorgi Kveseladze (Gloucester/ENG)
Wings: Akaki Tabutsadze, Alexander Todua, Mirian Modebadze (all Black Lion)
Full-backs: Davit Niniashvili (Lyon/FRA), Lasha Khmaladze (Black Lion)