The CU water pipe mentioned in the OP is the main supply line. GEC is connected about a foot after the main shutoff valve, not before.
Thanks for the clarification. The connection must be within 5’ of the point where to water pipe enters the building so at 1’ you’re good.
That sounds like there is or was a metal line as the supply. If still metal and if a meter is present or if any other isolating devices are installed - a bonding jumper must be installed.