However, there is still a dearth of evidence visible on publicly-accesible "OHI" (OverHead Imagery) that such is, indeed, the case. Unfortunately, the latest Google Earth published overflight date is 12/7/2019.
Maps of the naval facility at Guantanamo Bay are hard to obtain, but this section of an old "Visitors Map" provided identity and information on areas near the entrance channel which will prove to be of interest.
Frequent monitoring of the well-known "Detention Area" on the east end of the GITMO property (at lower right, above) indicates that the last significant, visible changes occurred ca 2013 or earlier.
There were internet rumors that two "Prison Barges" were headed for GITMO, and that $$$ was being spent on renovating a pier for docking them. But -- the only visible evidence was that an old pier/dock was REMOVED! There has been zero evidence of either prison barge appearing at GITMO.
On the QMap.pub "Theme" page for "GITMO", there was an (apparently, CGI) depiction of a new GITMO detention site:
No landform in the existing detention center area matched it, so, several unique features in the image were ID'd and labeled:
Then (within the constraints of matching a low-altitude,?helicopter? short focal length image -- with an extreme long-focal length space satellite image) the landform & features were matched on Google Earth:
Which clearly indicates that the site for the "QMap.pub" image is "Phillips Park" which was designated for the use of ships' crews on shore leave.
(But, virtually no naval vessels spend significant time at GITMO, nowadays...)
However, as of 12/7.2019, there was zero evidence of any construction activity in the Phillips Park area.
In a word, "YES!"
In the southwestern corner of the Naval Station property -- northwest of the airstrip on Leeward Point -- there is an area that wa used for housing and recreation for the MATS aircrew and USAF personnel assigned to the airfield. (As highlighted at left on this old map and on the "overview" photo at top.
By December, 2018, extensive "dirt work" (site preparation) had begin in the area, And, as of December, 2019, there were indications of twelve clusters of twelve small structures visible on Google Earth at the site.
The resolution of the shadowless image precludes determining whether the structures are tents or other pre-fab sheltets -- so the GI "catch-all" term for field shelter, "Hooch" was applied. At the ~5k foot "eye altitude" required to show the entire site, they look tiny -- but Google Earth measures them as 20 ft X 36 ft.
With the 144 units already on site, that is room enough to house 288 detainees in 16' X 20' luxury or 576 prisoners in 9' X 16' comfort...
NOTE: in neither the "QMap.pub" conceptual sketch nor the above OHI is there any evidence of security infrastructure (fences, guard stations, etc...)
