A list of items Squall has received from others while in Nautilus, which will likely be forever incomplete, since I'm starting it so late.
Italics are from other characters (in parenthesis), regular text is from the city.
Gunblade maintenance kit
A French maid outfit that reforms every time he destroys it
An "easy" button
Two yellow hard hats (received at different times)
Several bottles of Prozac
A plastic cake
A slice of toast with butter and jam
A pot of tea, and a teacup
A miniature model of himself made of ice cream (a.k.a. Ice Cream Clone) that never melts
A bottle of mint Pepsi and a bottle of green tea Coke
A blue button with the word "suicide" on it that spawns bacon when pressed
A Chocobo
A Santa hat
Hot chocolate
A pair of Nikes
A small but very nice leather bound notebook, an old-fashioned dip pen, some fine black ink, and a pencil (Mare)
A leather sheath for his gunblade with metal embroidery of Griever on both sides (Kyd Wykkyd)
Dark, neutral brown colored Snuggie (Sari)
Pocket incinerator (Starscream)
Silver lighter with his name on it in elegant, slightly lighter silver script (Jennifer)
Chain pocket puzzle (Sho)
A giant, moving lion plush, the size of a horse, as well as a hand-carved wooden toy of himself (Wally)
A nerf gun, a cheesy Christmas sweater, and nice chocolates ("Santa")
Boxes of chocolate (Rion)