Assuming the gas meter is in a standard wall-mounted cabinet (either recessed, semi-recessed or surface-mounted) then it should be OK to fit a bonding strap to the pipe inside the cabinet (within 600mm of the meter) and run the cable back to the MET.
If you prefer, you could connect the strap to the gas pipe where it enters the property (inside), as long as this is accessible.
gas meter is in standard surface-mounted cabinet.
do i disconnect the earth stake or leave connected ? and also connect the earth cable back to met, if i make this connection within the house it will be under the floorboards