...okay this is cute and all but she doesn't see the point in wasting any more time with it for the moment. She stuffs it in the backpack along with everything else, grabs her portal gun, picks a direction (since apparently it's just open space everywhere) and starts walking that way. Let's see what this new "not GLaDOS" makes of that.
Up, of course. Displaying a surprising degree of athleticism (for someone who spent the past who knows how many hundreds of years in suspension) and dexterity with the portal gun, she finds herself on one of the balconies.
More balconies are just fine by her, especially if she can find a more out-of-the-way one, hopefully one that looks less well-kept and more abandoned. As far from "civilization" as possible.
She'll start portaling very quickly away from this volume, going to other balconies and walls and floors, trying to outrun the overseer, keeping an eye out for portalable surfaces that aren't panels.
The direction she's heading seems to be towards support facilities. There are fewer test chambers suspended in air, and more cables, tubes (with Weighted Storage Cubes, turrets, and other items zipping through them), and tracks for panels and other test chamber components to move along.
There are not any convenient non-panel portalable surfaces in among all this, but there's plenty of catwalks.
And she runs.
Actually, they're not assorted, they're all Weighted Storage Cubes.
...uh huh. This is suspicious and interesting. She'll keep going and see what she reaches.
As she climbs up to the level of the conveyors, she can see more of what is going on. The robot arms are dexterously removing the Weighted Storage Cubes from a line of Weighted Storage Cube Storage Pallets, performing some subtle manipulation causing them to pop open, tipping them out onto the second conveyor (a mining-style conveyor belt suitable for loose material) — which causes nothing whatsoever to fall out — closing them up again, and dropping them in the tubes.
She'll move on carefully, watching her surroundings.
The catwalks also allow access to various parts of this mechanism, if she would like to examine or sabotage it.
What she wants is out. She doesn't know for sure that the whoever-it-was isn't still monitoring her but unless they have more capabilities than GLaDOS did she should be fine for now. She'll keep going forward, out, and up. The direction the cubes are coming from seems as good as any.
The catwalks allow access to a human-sized door into the building, which proclaims that this is the Weighted Storage Cube Storage Pallet Storage Vault. They also extend left and right; the view is blocked by assorted large objects, but there are sounds of active machinery all around.
...she'll explore a bit. What is the Weighted Storage Cube Storage Pallet Storage Vault?
(Not really miles.)
It is possible that some of these cubes might be actually storing things, but if so there's no obvious way to identify them. The robotic forklifts zipping down the aisles are certainly picking up or putting down particular pallets rather than the nearest available ones.
She'll come back out and take a left where the catwalk forked.
As each one enters this processing station, the panel and outer shell is braced, and an arm with a tiny spiked panel on the end punches through the center of the device, ruining it. The arm retracts, clinging mangled bits are cleaned off, and the line advances.
What the... Okay this deserves some more careful investigation. Where are the pieces going? Where are they coming from?