Gaza Strip Terrorist groups - foreign based

Abdallah Azzam Brigades (AAB):
aim(s): bolster its staging capabilities in the Gaza Strip against Israel to continue its attempts to disrupt Israel's economy and its efforts to establish security
area(s) of operation: launches homemade rockets from the Gaza Strip into populated Israeli territory, primarily the cities of Nahariya and Ashkelon (2018)

al-Aqsa Martyrs Brigade (AAMB):
aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, establish a Palestinian state comprising the West Bank, Gaza Strip, and Jerusalem
area(s) of operation: stages attacks from the Gaza Strip against Israeli soldiers and civilians inside Israel, including launching rockets and missiles (2018)

Islamic Revolutionary Guard Corps -- Qods Force (IRGC-QF):

aim(s):  supports the destruction of Israel through funding, training, and weapons
area(s) of operation:  Gaza Strip

(2019)

Islamic State of Iraq and ash-Sham (ISIS)-Sinai:
aim(s): bolster its staging capabilities in the Gaza Strip against Israel and, ultimately, establish a regional Islamic caliphate
area(s) of operation: stages attacks against Egyptian forces along the Gaza Strip-Egypt border and launches rockets into southern Israel from the border closest to Israel
note: formerly known as Ansar Bayt al-Maqdis (2018)