It is not possible to disable a Bond interface on Gaia OS:
NMSETH0029 Interface Name_of_Bond state cannot be set to off, it can only be deleted
set interface Name_of_Bond state off
ifconfig Name_of_Bond down
Currently, changing the state of the Bond interface (or the state of Bond's physical slave interfaces) is not allowed in Gaia OS (neither in Clish, nor in Gaia Portal).