1)
What is "Gevul Kadsho"?
1.
Radak: It is Eretz Yisrael.
2)
What is the significance of bringing them to Eretz Yisrael?
1.
Malbim: Via this, and choosing Har ha'Moriyah for the Beis ha'Mikdash, He fulfilled all His promises, including "Tevi'emo v'Sita'emo b'Har Nachalasecha" (Shemos 15:17).
3)
What is "Har Zeh"?
1.
Radak: It is the Beis ha'Mikdash - "Tevi'emo v'Sita'emo b'Har Nachalasecha" (Shemos 15:17). It says Zeh, for this Mizmor was said after the place of the Mikdash was known via Gad ha'Navi.
4)
How did Hashem's right hand acquire it?
1.
Radak: "Mikdash Hashem Konenu Yadecha" (Shemos 15:17)