Here is the draft executive order for shutting down Guantanamo. Note this language (emphasis added):

Sec. 3. Closure of Detention Facilities at Guantánamo. The detention facilities at Guantánamo for individuals covered by this order shall be closed as soon as practicable, and no later than one year from the date of this order. If any individuals covered by this order remain in detention at Guantánamo at the time of closure of those detention facilities, they shall be returned to their home country, released, transferred to a third country, or transferred to another United States detention facility in a manner consistent with law and the national security and foreign policy interests of the United States.

“Transferred to another United States detention facility”—including an American military facility, an American military facility located in another country?

There is this:

4(c)(5) Consideration of Issues Relating to Transfer to United States. The Review shall identify and consider legal, logistical, and security issues relating to the potential transfer of individuals currently detained at Guantánamo to facilities within the United States and the review participants shall work with Congress on any legislation that may be appropriate.

But that hardly answers the question, indeed, suggests that the answer may be “yes.”