func GoID() uintptr {
	return runtime.GoID()
}
return the current goroutine ID.

note that the returned value is DIFFERENT from most other goroutine libraries:
this GoID() returns the address, converted to uintptr, of the runtime.g struct.
NOT the runtime.g.goid field returned by most other libraries.
package gls
import (
	"github.com/cosmos72/gls/runtime"
)