get in

to succeed in entering a place, especially by using force or a trick:
They must have got in through the bathroom window.
The doors and windows had been bricked up to prevent squatters from getting in.
He banged his head on the car as he was getting in.
We barred the door to stop anyone getting into the room.
They've put barriers up to stop people (from) getting in.
The minibus has a lift to help wheelchair users to get in.

to arrive at your home or the place where you work:
What time did you get in last night?

If a train or other vehicle gets in at a particular time, that is when it arrives:
What time is the plane expected to get in?
(Cambridge Advanced Learner's Dictionary & Thesaurus からの get in の定義 © Cambridge University Press)

アメリカ英語辞典
to arrive at a place:
What time did you say his plane gets in?

to be elected to a political position:
If Archer gets in as mayor, he’s likely to raise taxes.
(Cambridge Academic Content Dictionary からの get in の定義 © Cambridge University Press)

- Cambridge Dictionary