Israel did not have control over Gaza for 50 years continuously since 1948; it occupied Gaza from 1967 until its disengagement in 2005.
Israel never had 50 years in Gaza. At least not since Israel was restored from colonizers in 1948

Israel and the Palestinians: History of the conflict explained
Source: bbc.com
Key Evidence
According to Britannica, Israel disengaged from Gaza in 2005 after occupying it since 1967.
britannica.combritannica.comIsrael’s disengagement from Gaza (2005)
UN documentation notes Israel's withdrawal from Gaza in 2005 while retaining border control.
un.orgun.orgHistory of the Question of Palestine
The Council on Foreign Relations timeline confirms Egypt administered Gaza from 1948 until Israeli occupation began in 1967.
education.cfr.orgeducation.cfr.orgIsraeli-Palestinian Conflict Timeline
What the Evidence Shows
After the establishment of Israel in 1948, the Gaza Strip was not under Israeli control but was administered by Egypt until 1967. This means Israel did not govern Gaza immediately following its founding in 1948.
Israel captured the Gaza Strip during the Six-Day War in June 1967 and maintained military occupation and settlements there until its unilateral disengagement in 2005, when it withdrew troops and settlers from Gaza.
Therefore, Israel's direct control over Gaza lasted approximately 38 years (1967–2005), which is less than 50 years.
The claim that Israel never had 50 years in Gaza since its restoration in 1948 aligns with historical timelines documented by multiple sources.
The phrase "restored from colonizers in 1948" refers to Israel's establishment as a state after British Mandate withdrawal, but this does not imply continuous control over all territories including Gaza.
Sources confirm that prior to 1967, Gaza was under Egyptian administration, and after 2005, Israel no longer maintained a military presence inside Gaza, though it controls borders and airspace to some extent.
This analysis is supported by historical timelines and official records from credible sources.