This is my personal savegame i made with the "GTA V SaveGame Editor of XB36Hazard".

I tested the savegame properly and every important door is open, even doors who ment to be closed (first 2 garages at LSPD at Mission Row for example)

Story is at 0.08% but you got every gold medal of every mission, sidequest etc. so game is basically done, but broken because you can't play with trevor.

Yes: Stamina is at 100 percent, so you don't lose health if you play on GTMP or RageMP.

Doors seem still to be closed:
- A double-door somewhere in the Rogers Scraps&Salvations building (the long stretch mission)
- One of the double-door at Michael's front door
- Some clothes-shop doors

If your a server owner, you can take them from the server via hashes. so it's still the best way to open as much as many doors without an urgent to delete them ;)

Installation:
C:\Users\YOURPCNAME\Documents\Rockstar Games\GTA V\Profiles\FOLDERWITHNUMBERSANDLETTERS

Place it in the folder named with random numbers and letters and replace your old Savgames (or make a backup of them) and start GTA V in singleplayer mode to load this savegame. If Rockstar ask you to choose your cloud-savegame or local, take the local one.