Yes there is (and you can also save to the original format). Personally, I haven't tested it in a while, so please report any issues if you encounter such.

1. I strongly recommend updating the ScummVM version, of GOG's release, to a more recent build (2.1.1, 2.1.2 or a development version -- which will be released in a few days, maybe 1-2 weeks). You can essentially copy over it with a new installation. (it resides under the ScummVM subfolder in your Blade Runner game folder)
https://buildbot.scummvm.org/builds.html

2. You need to use the debug console. While playing the game bring up the ScummVM debug console (warning: the ScummVM 2.1.0 version of the GOG release has a known issue with the way GOG launches the game, ie. without a background console, so it will probably freeze your game; you should definitely update to a more recent version of ScummVM!). Note that the old shortcut for the debugger was Ctrl+D, but now (in recent ScummVM builds) it's by default Ctrl+Alt+D and can be changed via the key-mapper feature.
https://wiki.scummvm.org/index.php/Blade_Runner#Debugger_commands

3. The debug console command is "load <path_to_save_game>". You will have to issue that by hand, so it's recommended to keep the file path to the save game simple enough.
See: https://wiki.scummvm.org/index.php/Blade_Runner#load

4. Even though I believe that this will work in the Restored Content version too, it might cause some unexpected behavior.

Again, since I haven't tested it for a while, please report any issues, bugs or unexpected behavior, you encounter so that we can look into them.