To use Gitkraken without network access on Linux you will need to copy files from an existing account that has been setup and connected whilst connected to the internet.
existingUser : the user that has already been setup whilst connected to internet
newUser : the user that will need access without internet access (eg. root user)
Open shell and run the following, replacing existingUser and newUser with the appropriate users:
#First I backup the GitKraken settings as these weren't working:
su newUser
cd ~
mv .gitkraken .gitkraken.dud
#Now I copy the working GitKraken settings from the existingUser
cp -r ~existingUser/.gitkraken .
# Now run gitkraken
gitkraken