Occupation is control, according to the UN -- and Israel's control over Gaza has been total and ironclad ----
Israel has (had?) control over: -- Gaza's airspace and territorial waters, -- movement into, out of, and around Gaza, --- international access to Gaza, the territory and the inhabitants, including doctors, the media and international leaders. --- employment and salary disbursement, --- the supply of civilian infrastructure, including water, sanitation, electricity, medical care, and food --- key governmental functions such as the management of the Palestinian population registry and electronics distribution. --- Israel also exercises other forms of control, including: --- armed checkpoints, --- taking captives at will without benefit of charge or trial and --- collective punishment.
Love it, or not, Israel has been the occupying power over Gaza, regardless of where Israelis live.