The GG has only dissolved government without PM's request once, but if supply is blocked in Parliament for the same act twice in a row, the PM can request the G

The GG has only dissolved government without PM's request once, but if supply is blocked in Parliament for the same act twice in a row, the PM can request the GG dissolve parliament in a double-dissolution. This is what happened with our last federal election - some random act, I can't recall, was blocked twice by the opposition and minority parties. Both sides thought they'd win the election, so they were happy to dissolve over a relatively minor issue. Basically the GG is there to keep parliament ticking over, and not descend into the madness of the last six years in the US where the chamber is eternally deadlocked (party 1 head of government against a party 2 chamber). It's bizarre how many ways the US has to stall its government (eg filibustering, debt limit, etc), and how few to ensure it keeps ticking along...