Sometimes I need to get off of the game while I’m in the middle of a mission but I can’t find a way to save besides ending the mission.
Is this possible?
How to save the progress on GTA 5 in the middle of a mission
grand-theft-auto-5
Related Solutions
Bring up your phone (UP on D-PAD or ↑ on Keyboard) and click the option "Quick Save":
You can also save by sleeping in a bed.
According to the info from GTA forums and players it would seem that there is no way to replay the bail bond missions.
So if you want the achievement of returning one of them alive, you should be careful and save before the missions. You only need to return one of them alive to get the achievement/trophy. Here's a thread about the bail bond missions.
Best Answer
Unfortunately you can't. You have two options:
You can quit the game and rely on your autosave. See this question for how to turn it on and when it saves. There's no way not to lose your progress in the current mission though.
Alternatively, you could leave the game paused, assuming that's practical.